scholarly journals Nitrogen Leaching Loss Estimation from Paddy Soil in the Taihu Lake Region of China by a Newly Developed Simple Model

2019 ◽  
Vol 2 (3) ◽  
pp. 19-30
Author(s):  
Wen-Ming Xie ◽  
Wen-Ming Xie ◽  
You Ma ◽  
Shi-Jun Li ◽  
Wei-Ming Sh ◽  
...  
Keyword(s):  
Paddy Soil ◽  
Taihu Lake ◽  
Agricultural Land ◽  
Surface Water Quality ◽  
Exponential Model ◽  
Nitrogen Leaching ◽  
Loss Estimation ◽  
N Leaching ◽  
Leaching Loss ◽  
Lake Region

Nitrogen leaching as a direct pathway of N loss from agricultural land can negatively affect groundwater and surface water quality. However, a simple and efficient method for nitrogen leaching loss estimation is still inefficient. In this study, an exponential model was developed using the experimental data from a two-year field experiment conducted in the Taihu Lake region of China to simulate the N leaching from the paddy soil. The results showed the leached N was in the range of 5.66 to 8.45 kg N/ha during the whole rice season, which was accounted for 1.7%-2.1% of the applied N. A good agreement between the measured and model predicted results for N leaching loss was observed, suggesting the validity of the established model. The model was further validated with the data of other studies in other regions. The results demonstrated this model is able to simulate the N leaching loss accurately and can provide a beneficial tool for users to predict N leaching loss in paddy soil.

scholarly journals Response of Vertical Migration and Leaching of Nitrogen in Percolation Water of Paddy Fields under Water-Saving Irrigation and Straw Return Conditions

Water ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 868 ◽  
Author(s):  
Chengxin Zheng ◽  
Zhanyu Zhang ◽  
Yunyu Wu ◽  
Richwell Mwiya
Keyword(s):  
Vertical Migration ◽  
Growth Stage ◽  
Nitrogen Leaching ◽  
Water Saving ◽  
Paddy Fields ◽  
N Leaching ◽  
Leaching Losses ◽  
Leaching Loss ◽  
Straw Return ◽  
Percolation Water

The use of water-saving irrigation techniques has been encouraged in rice fields in response to irrigation water scarcity. Straw return is an important means of straw reuse. However, the environmental impact of this technology, e.g., nitrogen leaching loss, must be further explored. A two-year (2017–2018) experiment was conducted to investigate the vertical migration and leaching of nitrogen in paddy fields under water-saving and straw return conditions. Treatments included traditional flood irrigation (FI) and two water-saving irrigation regimes: rain-catching and controlled irrigation (RC-CI) and drought planting with straw mulching (DP-SM). RC-CI and DP-SM both significantly decreased the irrigation input compared with FI. RC-CI increased the rice yield by 8.23%~12.26%, while DP-SM decreased it by 8.98%~15.24% compared with FI. NH4+-N was the main form of the nitrogen leaching loss in percolation water, occupying 49.06%~50.97% of TN leaching losses. The NH4+-N and TN concentration showed a decreasing trend from top to bottom in soil water of 0~54 cm depth, while the concentration of NO3−-N presented the opposite behavior. The TN and NH4+-N concentrations in percolation water of RC-CI during most of the rice growth stage were the highest among treatments in both years, and DP-SM showed a trend of decreasing TN and NH4+-N concentrations. The NO3−-N concentrations in percolation water showed a regular pattern of DP-SM > RC-CI > FI during most of the rice growth stage. RC-CI and DP-SM remarkably reduced the amount of N leaching losses compared to FI as a result of the significant decrease of percolation water volumes. The tillering and jointing-booting stages were the two critical periods of N leaching (accounted for 74.85%~86.26% of N leaching losses). Great promotion potential of RC-CI and DP-SM exists in the lower reaches of the Yangtze River, China, and DP-SM needs to be further optimized.

Dry deposition of N has a major impact on surface water quality in the Taihu Lake region in southeast China

2018 ◽  
Vol 190 ◽  
pp. 1-9 ◽  
Author(s):  
Chaopu Ti ◽  
Bo Gao ◽  
Yongxia Luo ◽  
Shuwei Wang ◽  
Scott X. Chang ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Dry Deposition ◽  
Taihu Lake ◽  
Surface Water Quality ◽  
Southeast China ◽  
Lake Region

Kinetics of Specific and Non-Specific Copper Sorption on Aggregates of an Acidic Paddy Soil from the Taihu Lake Region in East China

Pedosphere ◽  
2015 ◽  
Vol 25 (1) ◽  
pp. 37-45 ◽  
Author(s):  
Pei-Ya LIU ◽  
Qin-Liang WEN ◽  
Yu-Jiao LI ◽  
Chang-Xun DONG ◽  
Gen-Xing PAN
Keyword(s):  
Paddy Soil ◽  
Taihu Lake ◽  
East China ◽  
Lake Region ◽  
Kinetics Of ◽  
Copper Sorption

Long-Term Effects of Inorganic and Organic Amendments on Organic Carbon in a Paddy Soil of the Taihu Lake Region, China

Pedosphere ◽  
2011 ◽  
Vol 21 (2) ◽  
pp. 186-196 ◽  
Author(s):  
Li MA ◽  
Lin-Zhang YANG ◽  
Li-Zhong XIA ◽  
Ming-Xing SHEN ◽  
Shi-Xue YIN ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Paddy Soil ◽  
Taihu Lake ◽  
Organic Amendments ◽  
Long Term Effects ◽  
Lake Region ◽  
Inorganic And Organic

Nitrogen fate and environmental consequence in paddy soil under rice-wheat rotation in the Taihu lake region, China

2009 ◽  
Vol 319 (1-2) ◽  
pp. 225-234 ◽  
Author(s):  
Xu Zhao ◽  
Ying-xin Xie ◽  
Zheng-qin Xiong ◽  
Xiao-yuan Yan ◽  
Guang-xi Xing ◽  
...  
Keyword(s):  
Paddy Soil ◽  
Taihu Lake ◽  
Environmental Consequence ◽  
Nitrogen Fate ◽  
Lake Region

Effects of N application strategies on N leaching loss in paddy soil and N use characteristics in different super hybrid rice cultivars

2019 ◽  
Vol 18 (1) ◽  
pp. 27-41 ◽  
Author(s):  
Zhigang Bai ◽  
Jie Huang ◽  
Lianfeng Zhu ◽  
Xiaochuang Cao ◽  
Chunquan Zhu ◽  
...  
Keyword(s):  
Paddy Soil ◽  
Hybrid Rice ◽  
N Leaching ◽  
Rice Cultivars ◽  
N Application ◽  
Super Hybrid Rice ◽  
Leaching Loss ◽  
N Use

Anthropogenic Impact on Surface Water Quality in Taihu Lake Region, China

Pedosphere ◽  
2009 ◽  
Vol 19 (6) ◽  
pp. 765-778 ◽  
Author(s):  
Hai XU ◽  
Lin-Zhang YANG ◽  
Geng-Mao ZHAO ◽  
Jia-Guo JIAO ◽  
Shi-Xue YIN ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Anthropogenic Impact ◽  
Taihu Lake ◽  
Surface Water Quality ◽  
Lake Region

Response of typical paddy soil fertility to long-term cultivation in Taihu Lake Region

2009 ◽  
Vol 17 (2) ◽  
pp. 220-224 ◽  
Author(s):  
Xu-Kui WANG ◽  
Mao XU ◽  
Ji-Dong WANG ◽  
Jian-Ming WANG ◽  
Yong-Chun ZHANG
Keyword(s):  
Soil Fertility ◽  
Paddy Soil ◽  
Taihu Lake ◽  
Lake Region

Status of trace elements in paddy soil and sediment in Taihu Lake region

Chemosphere ◽  
2003 ◽  
Vol 50 (6) ◽  
pp. 707-710 ◽  
Author(s):  
X.C Wang ◽  
W.D Yan ◽  
Z An ◽  
Q Lu ◽  
W.M Shi ◽  
...  
Keyword(s):  
Trace Elements ◽  
Paddy Soil ◽  
Taihu Lake ◽  
Lake Region ◽  
Soil And Sediment

Agricultural practices and diffuse nitrogen pollution in Denmark: empirical leaching and catchment models

1999 ◽  
Vol 39 (12) ◽  
pp. 257-264 ◽  
Author(s):  
Hans E. Andersen ◽  
Brian Kronvang ◽  
Søren E. Larsen
Keyword(s):  
Agricultural Land ◽  
Root Zone ◽  
Agricultural Practices ◽  
Animal Manure ◽  
Annual Runoff ◽  
N Leaching ◽  
N Loss ◽  
Total N ◽  
Model Calculations ◽  
N Removal

An empirical leaching model was applied to data on agricultural practices at the field level within 6 small Danish agricultural catchments in order to document any changes in nitrogen (N) leaching from the root zone during the period 1989-96. The model calculations performed at normal climate revealed an average reduction in N-leaching that amounted to 30% in the loamy catchments and 9% in the sandy catchments. The reductions in N leaching could be ascribed to several improvements in agricultural practices during the study period: (i) regulations on livestock density; (ii) regulations on the utilisation of animal manure; (iii) regulations concerning application practices for manure. The average annual total N-loss from agricultural areas to surface water constituted only 54% of the annual average N leached from the root zone in the three loamy catchments and 17% in the three sandy catchments. Thus, subsurface N-removal processes are capable of removing large amounts of N leached from agricultural land. An empirical model for the annual diffuse N-loss to streams from small catchments is presented. The model predicts annual N-loss as a function of the average annual use of mineral fertiliser and manure in the catchment and the total annual runoff from the unsaturated zone.

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