Growth and Development of Field Horsetail (Equisetum arvenseL.)

Weed Science ◽  
1986 ◽  
Vol 34 (2) ◽  
pp. 271-275 ◽  
Author(s):  
George Marshall
Keyword(s):  
Growth And Development ◽  
Dry Matter ◽  
Shoot Growth ◽  
Equisetum Arvense ◽  
Shoot Height ◽  
Potted Plants ◽  
Shoot Number ◽  
Herbicide Treatments ◽  
Shoot Growth Rate ◽  
Rhizome System

The growth and development of field horsetail (Equisetum arvenseL. # EQUAR) was measured outdoors using potted plants grown from one-node rhizome fragments. Shoot growth rate increased slowly after planting in March, accelerating to a maximum during July with maximas for shoot height during August and shoot number in September. Rhizome system growth rates initially followed a similar pattern to that of the shoots achieving a maximum during July. Dry matter accumulated in the rhizomes until October and declined thereafter throughout the winter. Tubers initiated during August grew in size and number until November, well beyond the period of active shoot growth and onset of senescence. The characteristics of the growth and development of field horsetail are discussed in relation to achieving weed control via cultural and herbicide treatments.

The growth of the lucerne plant after cutting: I. The effects of cutting at different stages of maturity and at different intensities

1968 ◽  
Vol 19 (4) ◽  
pp. 517 ◽  
Author(s):  
GJ Leach
Keyword(s):  
Dry Matter ◽  
Shoot Growth ◽  
Extension Growth ◽  
Grazing Management ◽  
Shoot Number ◽  
Shoot Size ◽  
Shoot Growth Rate ◽  
Main Effects ◽  
Pasture Plants

Variation in shoot number, shoot size, and yield of dry matter occurring in the regrowth from lucerne plants cut at different stages of maturity and at different intensities is reported. The main effects of the treatments arose through variation in shoot number and changes in the time at which each shoot commenced extension growth; a linear regression utilizing this information about the population of shoots accounted for nearly all the variation in yield. Less severe, or later, cutting resulted in greater yields of dry matter in a 4 week period of regrowth. Changes in shoot number and shoot size both contributed to the variation in the yield of regrowth. Shoot size was mainly determined by the time at which the shoot resumed extension growth, and once such growth was resumed the shoot growth rate was apparently independent of the cutting treatment applied. The results are discussed in relation to currently held concepts on the role of "reserves" and of residual leaf area in promoting the regrowth of pasture plants. The development of lucerne adapted to grazing management is also considered.

scholarly journals An examination on various concentrations of mahkota dewa and meniran extract and liquid organic fertilizer in Centella asiatica shoot growth in vitro

2017 ◽  
Vol 14 (2) ◽  
pp. 47-55
Author(s):  
VENI SISKAYANTI ◽  
RETNA BANDRIYATI ARNIPUTRI ◽  
PRASWANTO PRASWANTO
Keyword(s):  
Shoot Growth ◽  
Organic Fertilizer ◽  
Centella Asiatica ◽  
Shoot Height ◽  
Media Type ◽  
Extract Concentration ◽  
Shoot Number ◽  
Media Types ◽  
The Brain

Siskayanti V, Arniputri RB, Praswanto. 2016. An examination on various concentrations of mahkota dewa and meniran extract and liquid organic fertilizer in Centella asiatica shoot growth in vitro. Biofarmasi 14: 47-55. Centella (Centella asiatica L) is one plant utilized as the traditional medicine because it has many benefits, one of which is to fulfill the brain requirement. The aims of this research was to know of media type, mahkota dewa and meniran extract, concentration of meniran, concentration of mahkota dewa, and concertation of liquid organic fertilizer what as well as shoot growth of Centella using tissue culture and filtering (2k design) that is expected it can be screened of the basic media types, organic material types (mahkota dewa and meniran extract), meniran concentration, mahkota dewa concentration and liquid organic fertilizer concentration. This research was taken place in Plant Physiology and Biotechnology Laboratory of Agriculture Faculty of Sebelas Maret University, from November 2010 to June 2011. This research used 2k design with RAL environment. Factor 1: Media type ( ½ MS and MS); Factor 2: Concentration of liquid organic fertilizer (2 mL/L and 20 mL/L); Factor 3: Concentration of meniran 5 mL/L and 25 mL/L); and Factor 4: Concentration of mahkota dewa (5 mL/L and 25 mL/L). Thus, there is 24 = 16 treatment combinations, each of which is repeated three times. The variables observed are shoot emerging duration, shoot number, shoot height, and leaves number. The data were analyzed descriptively. The result of research showed that basic media MS, that basic media MS, POC 20 mL/L, and meniran extract 5 mL/L provided the best explants growth of Centella through in vitro.

scholarly journals INTERAKSI BAP DAN NAA TERHADAP PERTUMBUHAN EKSPLAN ANGGREK VANDA SECARA IN-VITRO

2017 ◽  
Vol 29 (1) ◽  
pp. 1-8
Author(s):  
Selvia Sutriana ◽  
Hasan Basri Jumin ◽  
Mardaleni Mardaleni
Keyword(s):  
Shoot Growth ◽  
Shoot Height ◽  
Significance Level ◽  
Abnormal Embryo ◽  
Randomized Design ◽  
Shoot Number ◽  
Completely Randomized Design ◽  
Growing Shoot

This research aims to obtain the combination of BAP and NAA concentration which give the best effect on explant growth of Vanda orchid in-vitro. The research was conducted at the biotechnology laboratory Faculty of Agriculture Riau Islamic University Pekanbaru from August to December 2013. The completely randomized design with two factorials (BAP and NAA) was used. The observed parameters included percentage of shoot growing, shoot age, shoot height, shoot number and abnormal embryo somatic. Data were analysed using statistics and BNJ Test at the 5% significance level. The result showed that,interactionally,BAP and NAA applications had a significant effect on height plant with the best concentration without BAP and 1.0 ppm NAA.  Individually, the application of BAP effected significantly on percentage of shoot growing, shoot growth, shoot height and shoot number with the best concentration without BAP and 0.1 BAP. Furthermore, the application of NAA influenced significantly on percentage of shoot growing, shoot age, shoot height and shoot number with the best concentration of 1.0 ppm NNA

NGHIÊN CỨU MỘT SỐ BIỆN PHÁP KỸ THUẬT TĂNG KHẢ NĂNG NHÂN GIỐNG CÂY SÂM PHÚ YÊN (Abelmoschus sagittifolius Kurz)

2014 ◽  
Vol 91 (3) ◽  
Author(s):  
Nguyễn Đình Thi
Keyword(s):  
Vegetative Propagation ◽  
Shoot Growth ◽  
Propagation Rate ◽  
Root Weight ◽  
Root Number ◽  
College Of Agriculture ◽  
Shoot Height ◽  
Shoot Number ◽  
Root And Shoot Growth ◽  
Shoot Weight

TÓM TẮT Các thí nghiệm được tiến hành trong điều kiện nhà ươm có mái che tại Trung tâm Ứng dụng và Chuyển giao công nghệ, Sở Khoa học và Công nghệ tỉnh Phú Yên.  Kết quả cho thấy: 1) Xử lý α-NAA 400 ppm trong thời gian 1,5-2 phút, cành giâm dài 7 cm và trên cành để lại 4 lá, phun bổ sung dinh dưỡng bằng phân bón lá Supermes giúp cành giâm ra rễ nhiều, khả năng sinh trưởng của rễ và chồi cành tốt hơn đối chứng và các công thức thí nghiệm khác; 2) Giá thể vô bầu cành giâm có thành phần 69% đất phù sa + 1% super lân + 20% trấu hun + 10% phân chuồng hoai giúp cây giống sinh trưởng phát triển khỏe; 3) Từ kết quả các thí nghiệm, chúng tôi đã xây dựng quy trình nhân giống sâm Phú Yên cải tiến, kết quả thử nghiệm quy trình cải tiến cho thấy cây giống sau giâm 36 ngày có các chỉ tiêu sinh trưởng về chồi và rễ hơn quy trình cũ ở mức sai khác có ý nghĩa thống kê, cụ thể chiều dài chồi tăng 5%, số chồi tăng 21%, khối lượng chồi tăng 14%, số rễ/cành giâm tăng 25%, chiều dài rễ tăng 15% và khối lượng rễ tăng 12%. Từ khóa: Sâm Phú Yên, biện pháp kỹ thuật, nhân giống vô tính.STUDY ON APPROPRIATE CULTIVATED TECHNIQUES FOR IMPROVING VEGETATIVE PROPAGATION RATE OF PHU YEN GINSENG (Abelmoschus sagittifolius Kurz)Nguyễn Đình Thi, College of Agriculture and Forestry, Hue UniversityTrương Hùng Mỹ, Phu Yen Department of Science and TechnologySUMMARYExperiments were conducted in nethourse at Application and Transformation Technology Center, Phu Yen Department of Science and Technology. The results showed that: 1) Using α-NAA 400 ppm solution dipped in 1.5-2 minutes, main stem with 7cm length and 4 leaves, spraying Supermes 3days/time appeared optimal for root and shoot growth of Phu Yen ginseng stem cutting; 2) In addition, using rootting medium mixture of 69% silt + 1% super phosphate + 20% rice husk + 10% compost obtained the highest of shoot, root and leaves growth; 3) After 36 days vegetative propagation, when comparing with the old cultivated techniques Phu Yen ginseng increase 5-25% growth indicators (shoot height = 5%, shoot number = 21%, shoot weight = 14%, root number = 25%, root length = 15% and root weight = 12%).Keys word: Phu Yen ginseng, cultivated techniques, vegetative propagation.

Screening cereals for genotypic variation in efficiency of phosphorus uptake and utilisation

2002 ◽  
Vol 53 (3) ◽  
pp. 295 ◽  
Author(s):  
L. D. Osborne ◽  
Z. Rengel
Keyword(s):  
Dry Matter ◽  
Shoot Growth ◽  
Genotypic Variation ◽  
Phosphorus Uptake ◽  
Dry Weight ◽  
P Efficiency ◽  
P Content ◽  
Shoot Growth Rate ◽  
Utilisation Efficiency ◽  
P Supply

One hundred and six Australian cereal genotypes, including wheat, triticale, and rye, were screened for their ability to take up and utilise soluble phosphorus at different rates of P supply. Plants were screened in outdoor tanks irrigated at regular intervals with nutrient solution amended with 3 rates of P. Genotypes were ranked according to the following 3 criteria: shoot growth at deficient P supply, the relative shoot growth rate (dry weight at deficient P/dry weight at sufficient P), and phosphorus utilisation efficiency (amount of dry matter produced per unit of P accumulated in shoots corrected for seed P content). Considerable genotypic variation in growth and P utilisation efficiency was found in the cereal germplasm. Rye and triticale were generally more efficient in taking up and utilising P than wheat at low rates of P supply. Wheat genotypes Egret and Durati showed relatively high, and genotype Cadoux relatively low, P efficiency.

Nitrogen Demand of Cut Chrysanthemums in Relation to Shoot Height and Planting Date

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 523c-523
Author(s):  
Siegfried Zerche
Keyword(s):  
Dry Matter ◽  
Plant Density ◽  
Plant Biomass ◽  
N Uptake ◽  
Planting Date ◽  
Dry Matter Accumulation ◽  
Planting Dates ◽  
Shoot Height ◽  
Climate Conditions ◽  
Growing Period

Refined nutrient delivery systems are important for environmentally friendly production of cut flowers in both soil and hydroponic culture. They have to be closely orientated at the actual nutrient demand. To solve current problems, express analysis and nutrient uptake models have been developed in horticulture. However, the necessity of relatively laborious analysis or estimation of model input parameters have prevented their commercial use up to now. For this reason, we studied relationships between easily determinable parameters of plant biomass structure as shoot height, plant density and dry matter production as well as amount of nitrogen removal of hydroponically grown year-round cut chrysanthemums. In four experiments (planting dates 5.11.91; 25.3.92; 4.1.93; 1.7.93) with cultivar `Puma white' and a fixed plant density of 64 m2, shoots were harvested every 14 days from planting until flowering, with dry matter, internal N concentration and shoot height being measured. For each planting date, N uptake (y) was closely (r2 = 0.94; 0.93; 0.84; 0.93, respectively) related to shoot height (x) at the time of cutting and could be characterized by the equation y = a * × b. In the soilless cultivation system, dry matter concentrations of N remained constant over the whole growing period, indicating non-limiting nitrogen supply. In agreement with constant internal N concentrations, N uptake was linearly related (r2 = 0.94 to 0.99) to dry matter accumulation. It is concluded that shoot height is a useful parameter to include in a simple model of N uptake. However, in consideration of fluctuating greenhouse climate conditions needs more sophisticated approaches including processes such as water uptake and photosynthetically active radiation.

Herbicide Effects on Weed Control and Shoot Growth of Young Apple (Malus sylvestris) and Peach (Prunus persica) Trees

1994 ◽  
Vol 8 (4) ◽  
pp. 840-848 ◽  
Author(s):  
Chester L. Foy ◽  
Susan B. Harrison ◽  
Harold L. Witt
Keyword(s):  
Shoot Growth ◽  
Field Experiments ◽  
Prunus Persica ◽  
Weed Species ◽  
Apple Trees ◽  
Herbicide Treatments ◽  
One Year ◽  
Broadleaf Species ◽  
Old Trees ◽  
Peach Trees

Field experiments were conducted at two locations in Virginia to evaluate the following herbicides: alachlor, diphenamid, diuron, metolachlor, napropamide, norflurazon, oryzalin, oxyfluorfen, paraquat, pendimethalin, and simazine. One experiment involved newly-transplanted apple trees; the others, three in apple and one in peach trees, involved one-year-old trees. Treatments were applied in the spring (mid-April to early-May). Control of annual weed species was excellent with several treatments. A broader spectrum of weeds was controlled in several instances when the preemergence herbicides were used in combinations. Perennial species, particularly broadleaf species and johnsongrass, were released when annual species were suppressed by the herbicides. A rye cover crop in nontreated plots suppressed the growth of weeds. New shoot growth of newly-transplanted apple trees was increased with 3 of 20 herbicide treatments and scion circumference was increased with 11 of 20 herbicide treatments compared to the nontreated control. Growth of one-year-old apple trees was not affected. Scion circumference of one-year-old peach trees was increased with 25 of 33 herbicide treatments.

RESPONSE OF PEAS TO ENVIRONMENT: IV. EFFECT OF FIVE SOIL WATER REGIMES ON GROWTH AND DEVELOPMENT OF PEAS

1968 ◽  
Vol 48 (2) ◽  
pp. 129-137 ◽  
Author(s):  
A. R. Maurer ◽  
H. F. Fletcher ◽  
D. P. Ormrod
Keyword(s):  
Water Stress ◽  
Soil Water ◽  
Growth And Development ◽  
Dry Matter ◽  
Fresh Weight ◽  
Water Regimes ◽  
Severe Water Stress ◽  
Water Conditions ◽  
Before And After ◽  
Soil Water Conditions

Pea plants growing in "weighing lysimeters" were subjected to five soil-water regimes to determine their response to varying conditions of soil water imposed at different stages of development. Plants subjected to a minimal water stress developed luxuriantly and continued to grow up to the harvest period. Pea yield and plant height were not reduced, but fresh weight and dry matter were less if irrigation was applied when soil water fell to 60% rather than 88% of that available. A severe water stress after blossom reduced pea yield, irrespective of soil-water conditions prior to blossom. Plants which had been given ample soil water before blossom wilted visibly when a severe stress was imposed in the post-blossom period, yet wilting did not occur in plants subjected to severe water stress both before and after blossom. Severe water stress prior to blossom did not cause a decrease in pea yield if ample soil moisture was made available after blossom.

SOD-SEEDING BIRDSFOOT TREFOIL IN ESTABLISHED ORCHARDGRASS WITH OVERALL OR BANDED HERBICIDES

1983 ◽  
Vol 63 (1) ◽  
pp. 267-276 ◽  
Author(s):  
R. L. NICHOLS ◽  
R. A. PETERS
Keyword(s):  
Dry Matter ◽  
Dactylis Glomerata ◽  
Lotus Corniculatus ◽  
Birdsfoot Trefoil ◽  
No Tillage ◽  
Botanical Composition ◽  
Stand Establishment ◽  
Matter Production ◽  
Herbicide Treatments ◽  
Dactylis Glomerata L

Birdsfoot trefoil (Lotus corniculatus L. ’Viking’) was seeded directly into a predominantly orchardgrass (Dactylis glomerata L.) sward following overall or banded applications of paraquat (1,1′-dimethyl-4, 4′-bipyridinium ion, as dichloride salt) or glyphosate [N-(phosphonomethyl)glycine, as isopropylamine salt] to determine the degree of sward control necessary for stand establishment without tillage. Effects of the herbicide treatments and the seeding on botanical composition and dry matter production were determined by a vertical intercept technique and by hand separations of harvests into botanical components. Trefoil establishment was proportional to the degree of sward control during the seeding year. Little trefoil was established by direct seeding without herbicides. The banded herbicide treatments were less effective than overall herbicide applications for trefoil establishment. Trefoil yield obtained following overall application of paraquat was approximately 65% of that obtained following overall glyphosate treatment.Key words: Dactylis glomerata, glyphosate, Lotus corniculatus, herbicide, no-tillage, paraquat

scholarly journals Growth and Development of Purple Nutsedge Based on Days or Thermal Units

2015 ◽  
Vol 33 (2) ◽  
pp. 165-173 ◽  
Author(s):  
R.S.O. Lima ◽  
E.C.R. Machado ◽  
A.P.P. Silva ◽  
B.S. Marques ◽  
M.F. Gonçalves ◽  
...  
Keyword(s):  
Plant Growth ◽  
Mathematical Models ◽  
Growth And Development ◽  
Dry Matter ◽  
Cyperus Rotundus ◽  
Growing Degree Days ◽  
Plant Growth And Development ◽  
Degree Days ◽  
Purple Nutsedge ◽  
Independent Trials

This work was carried out with the objective of elaborating mathematical models to predict growth and development of purple nutsedge (Cyperus rotundus) based on days or accumulated thermal units (growing degree days). Thus, two independent trials were developed, the first with a decreasing photoperiod (March to July) and the second with an increasing photoperiod (August to November). In each trial, ten assessments of plant growth and development were performed, quantifying total dry matter and the species phenology. After that, phenology was fit to first degree equations, considering individual trials or their grouping. In the same way, the total dry matter was fit to logistic-type models. In all regressions four temporal scales possibilities were assessed for the x axis: accumulated days or growing degree days (GDD) with base temperatures (Tb) of 10, 12 and 15 oC. For both photoperiod conditions, growth and development of purple nutsedge were adequately fit to prediction mathematical models based on accumulated thermal units, highlighting Tb = 12 oC. Considering GDD calculated with Tb = 12 oC, purple nutsedge phenology may be predicted by y = 0.113x, while species growth may be predicted by y = 37.678/(1+(x/509.353)-7.047).

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