The Variation of Nitrate in the Soil Profile for Continuous Spring Maize System under Different Soil Fertilities in the Northeast of China

2014 ◽  
Vol 1065-1069 ◽  
pp. 3114-3122
Author(s):  
Li Yan ◽  
Hong Guang Cai ◽  
Zhi Dan Zhang ◽  
Qiang Gao ◽  
Wen Xi Lu ◽  
...  
Keyword(s):  
Northeast China ◽  
Fertilizer Treatment ◽  
High Fertility ◽  
Nitrate Accumulation ◽  
Fertilizer Rate ◽  
Safety Level ◽  
Spring Maize ◽  
Long Term Experiment ◽  
Single Fertilization ◽  
Northeast Of China

In the continuous Spring Maize system in Northeast China,the nitrate accumulation and succession characteristics of different soils and fertility in three locations with five fertilization treatments, which included no fertilizer treatment (CK), farmer conventional treatment (FC), recommendation fertilization (RF), control-released fertilizer (CRF) and single fertilization (SF), was compared by 6 years’ long-term experiment. The results showed that nitrate accumulation was drastically significant in high pH soils; potential nitrate increasing trend of high fertility soil was lower; new type fertilizer, for example controlled release fertilizer (CRF), and recommendation fertilizer rate (RF) could obviously decrease nitrate accumulation in single fertilization and in split fertilization; the nitrate excessive accumulation in soils could be improved by not only controlling fertilization, fertilizer and fertilizer rate, but also considering of soil types and soil fertility; and at present, in Northeast China, nitrate accumulation was in rational and safety level, but still exist potential risk.

Effects of 5-aminolevulinic acid and ethephon compound on carbon balance of source-sink of spring maize in Northeast China

2020 ◽  
Vol 46 (7) ◽  
pp. 1063-1075
Author(s):  
Peng YAN ◽  
Yan-Li XU ◽  
Qi WANG ◽  
Feng-Lu ZHANG ◽  
Rui-Jie LI ◽  
...  
Keyword(s):  
Northeast China ◽  
Carbon Balance ◽  
Aminolevulinic Acid ◽  
Spring Maize ◽  
Source Sink

Monitoring growth condition of spring maize in Northeast China using a process-based model

2018 ◽  
Vol 66 ◽  
pp. 27-36 ◽  
Author(s):  
Peijuan Wang ◽  
Yuyu Zhou ◽  
Zhiguo Huo ◽  
Lijuan Han ◽  
Jianxiu Qiu ◽  
...  
Keyword(s):  
Growth Condition ◽  
Northeast China ◽  
Spring Maize

Assessment of the Effects of Environmental Factors on the Response of Wheat to Fertilizer in On-farm Trials in a Mediterranean Type Environment

1996 ◽  
Vol 32 (3) ◽  
pp. 339-349 ◽  
Author(s):  
M. Pala ◽  
A. Matar ◽  
A. Mazid
Keyword(s):  
Seasonal Rainfall ◽  
Fertilizer Treatment ◽  
Regression Equations ◽  
Strongly Correlated ◽  
Soil Mineral ◽  
Wheat Grain ◽  
Soil Mineral Nitrogen ◽  
Fertilizer Rate ◽  
On Farm ◽  
Fertilizer Rates

SUMMARYA series of researcher-managed wheat fertilizer trials was conducted on representative farmers' fields across northwest Syria between 1986 and 1990. Wheat grain and straw yields were strongly correlated with seasonal (October-May) rainfall, almost irrespective of soil fertility, crop sequence or fertilizer rate, with a highly significant response to nitrogen fertilizer which increased with increasing rainfall and decreasing initial soil mineral-nitrogen values. These results were summarized in regression equations which express yield in terms of fertilizer rates, seasonal rainfall and their interactions. The equations with applied nitrogen and seasonal rainfall were the most appropriate for determining fertilizer needs. Economic analysis indicated that all fertilizer treatment rates were profitable under existing price conditions and that fertilizer use would still be beneficial for a nitrogen price up to three times higher than that of the price of grain (weight for weight) with a seasonal rainfall of 250 mm, and up to six times higher with a seasonal rainfall of 450 mm.

scholarly journals Effects of Three Fertilization Methods on Weed Growth and Herbicide Performance in Soilless Nursery Substrates1

2018 ◽  
Vol 36 (4) ◽  
pp. 133-139
Author(s):  
Cody J. Stewart ◽  
S. Christopher Marble ◽  
Brian E. Jackson ◽  
Brian J. Pearson ◽  
P. Christopher Wilson
Keyword(s):  
Fertilizer Treatment ◽  
Fertility Rates ◽  
Weed Species ◽  
Fertilizer Placement ◽  
Digitaria Sanguinalis ◽  
Fertilizer Rate ◽  
Weed Growth ◽  
Eclipta Prostrata ◽  
Preemergence Herbicides ◽  
Large Crabgrass

Abstract Research objectives were to determine the effect of fertilization method (incorporation, subdress, and topdress) on weed growth and the performance of preemergence herbicides applied to soilless substrates. Nursery containers were filled with a pine bark:peat substrate and fertilized at two different rates [4.4 and 9.5 kg.m−3 (8.9 and 19.2 lb.yd−3)] via topdressing, subdressing, or incorporating. Containers were treated with either dimethenamid-P for spotted spurge (Euphorbia maculata L.), flumioxazin for eclipta (Eclipta prostrata L.) or prodiamine for large crabgrass (Digitaria sanguinalis L.). A control was established for each fertilizer rate/placement and weed species that was not treated. Incorporating or subdressing fertilizer resulted in reduced large crabgrass and spotted spurge growth in non-treated containers. Weeds grew larger at the higher fertility rates in both topdress and incorporated treatments but fertilizer rate did not affect growth of spotted spurge or large crabgrass when fertilizers were subdressed. Herbicides generally provided commercially acceptable weed control regardless of fertilizer treatment, but results varied with species. Results suggest that in the absence of herbicides, topdressing may result in greater weed growth compared with subdressing or incorporating fertilizers; however, fertilizer placement will have less impact on herbicide performance if proper herbicides are chosen and applied correctly. Index words: topdress, subdress, incorporate, large crabgrass, eclipta, spotted spurge, preemergence Chemicals used in this study: Flumioxazin (SureGuard®); 2-[7-fluoro-3,4-dihydro-3-oxo-4-(2-propynyl)-2H-1,4-benzoxazin-6-yl]-4,5,6,7-tetrahydro-1H-isoindole1,3(2H)-dione; Dimethenamid-P (Tower) 2-chloro-N-[(2,4-dimethyl-3-thienyl)-N-(2-methoxy-1-methylethyl)acetamide; Prodiamine (Barricade) 2,4-dinitro-N3, N3-dipropyl-6-(trifluoromethyl)-1,3-benzenediamine (Barricade®) Species used in this study: Large crabgrass (Digitaria sanguinalis L.); Eclipta (Eclipta prostrata L.); Spotted spurge (Euphorbia maculata L.)

scholarly journals Interannual variability of net ecosystem carbon production and its climatic and biotic mechanism during 2005-2018 in a rain-fed maize ecosystem

2020 ◽  
Author(s):  
Hui Zhang ◽  
Tianhong Zhao ◽  
Sidan Lyu ◽  
Hang Wu ◽  
Yang Yang ◽  
...  
Keyword(s):  
Climate Changes ◽  
Daily Maximum ◽  
Spring Precipitation ◽  
Area Index ◽  
Carbon Production ◽  
Ecosystem Carbon ◽  
Spring Maize ◽  
Carbon Release ◽  
Northeast Of China ◽  
Beginning Date

AbstractThe interannual variation (IAV) of net ecosystem carbon production (NEP) plays an important role in understanding the mechanisms of the carbon cycle in the agriculture ecosystem. In this study, the IAV of NEP, which were expressed as annual values and anomalies, and its climatic and biotic controls mechanism, were investigated based on an eddy covariance dataset of rain-fed spring maize during 2005–2018 in the northeast of China. The annual NEP was 270±115 g C m−2yr −1. Annual values and anomalies of NEP were positively correlated with that of precipitation (PPT), gross ecosystem production (GEP) and daily maximum NEP (NEPmax). Annual anomalies of NEP were dominantly and positively controlled by the soil water content (SWC) through GEP and the soil temperature (Ts) through RE. In comparison, annual anomalies of NEP were dominantly and negatively controlled by summer VPD through the NEPmax, positively adjusted by spring precipitation and the effective accumulative temperature through the beginning date (BDOY) of the affecting carbon uptake period (CUP), and by autumn precipitation and leaf area index through the end date (EDOY) of the affecting CUP. Residues restrained the carbon release at the beginning of the year, and accelerated the carbon release at the end of the year. Our results hightlight that NEP might be more sensitive to the change of water condition (such as PPT, SWC and VPD) induced by the climate changes.

Potassium accumulation, partitioning, and remobilization in high-yield spring maize in Northeast China

2019 ◽  
Vol 42 (11-12) ◽  
pp. 1366-1377 ◽  
Author(s):  
Geng Yuhui ◽  
Cao Guojun ◽  
Wang Lichun ◽  
Wang Shuhua
Keyword(s):  
Northeast China ◽  
High Yield ◽  
Potassium Accumulation ◽  
Spring Maize

scholarly journals Response of grain yield to plant density and nitrogen rate in spring maize hybrids released from 1970 to 2010 in Northeast China

2016 ◽  
Vol 4 (6) ◽  
pp. 459-467 ◽  
Author(s):  
Chunrong Qian ◽  
Yang Yu ◽  
Xiujie Gong ◽  
Yubo Jiang ◽  
Yang Zhao ◽  
...  
Keyword(s):  
Grain Yield ◽  
Northeast China ◽  
Plant Density ◽  
Nitrogen Rate ◽  
Maize Hybrids ◽  
Spring Maize
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