Yuhua Tian
Chinese Academy of Sciences
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Featured researches published by Yuhua Tian.
Pedosphere | 2007
Yuhua Tian; Bin Yin; Linzhang Yang; Shi-Xue Yin; Zhaoliang Zhu
Abstract Although nitrogen (N) loss through runoff and leaching from croplands is suspected to contribute to the deterioration of surrounding water systems, there is no conclusive evidence for paddy soils to prove this hypothesis. In this study, field plot experiments were conducted to investigate N losses through runoff and leaching for two consecutive years with 3 N fertilization rates in rice (Oryza sativa L.)-wheat (Triticum aestivum L.) rotations in the Taihu Lake region, China. A water collection system was designed to collect runoff and leachates for both the rice and wheat seasons. Results showed that dissolved N (DN), rather than particulate N (PN), was the main form of N loss by runoff. The NO3−-N concentration in runoff was between 0.1 and 43.7 mg L−, whereas the NH4+-N concentration ranged from below detection limit to 8.5 mg L−. Total N (TN) loads by runoff were 1.0–17.9 and 5.2–38.6 kg ha− during rice and wheat seasons, respectively, and the main loss occurred at the early growing stage of the crops. Nitrogen concentrations in leachates during the rice seasons were below 1.0 mg L− and independent of the N application rate, whereas those during the wheat season increased to 8.2 mg L− and were affected by the fertilizer rate. Annual losses of TN through runoff and leaching were 13.7–48.1 kg ha-1 from the rice-wheat cropping system, accounting for 5.6%–8.3% of the total applied N. It was concluded that reduction in the N fertilization rate, especially when the crop was small in biomass, could lower the N pollution potential for water systems.
Pedosphere | 2012
Mei-Hua Deng; Xiaojun Shi; Yuhua Tian; Bin Yin; Shao-Lin Zhang; Zhaoliang Zhu; Sonoko D. Kimura
Abstract To determine the optimal amount of nitrogen (N) fertilizer for achieving a sustainable rice production at the Taihu Lake region of China, two-year on-farm field experiments were performed at four sites using various N application rates. The results showed that 22%–30% of the applied N was recovered in crop and 7%–31% in soils at the rates of 100–350 kg N ha−1. Nitrogen losses increased with N application rates, from 44% of the applied fertilizer N at the rate of 100 kg N ha−1 to 69% of the N applied at 350 kg N ha−1. Ammonia volatilization and apparent denitrification were the main pathways of N losses. The N application rate of 300 kg N ha−1, which is commonly used by local farmers in the study region, was found to lead to a significant reduction in economic and environmental efficiency. Considering the cost for mitigating environmental pollution and the maximum net economic income, an application rate of 100–150 kg N ha−1 would be recommended. This recommended N application rate could greatly reduce N loss from 199 kg N ha−1 occurring at the N application rate of 300 kg N ha−1 to 80–110 kg N ha−1, with the rice grain yield still reaching 7 300–8 300 kg DW ha−1 in the meantime.
Field Crops Research | 2013
Yansheng Cao; Yuhua Tian; Bin Yin; Zhaoliang Zhu
Agriculture, Ecosystems & Environment | 2015
Miao Zhao; Yuhua Tian; Yuchun Ma; Min Zhang; Yuanlin Yao; Zhengqin Xiong; Bin Yin; Zhaoliang Zhu
Agriculture, Ecosystems & Environment | 2014
Yansheng Cao; Yuhua Tian; Bin Yin; Zhaoliang Zhu
Agriculture, Ecosystems & Environment | 2011
Yuhua Tian; Linzhang Yang; Bin Yin; Zhaoliang Zhu
Atmospheric Environment | 2015
Miao Zhao; Yuhua Tian; Min Zhang; Yuanlin Yao; Yuqin Ao; Bin Yin; Zhaoliang Zhu
Field Crops Research | 2017
Yuanlin Yao; Min Zhang; Yuhua Tian; Miao Zhao; Bowen Zhang; Meng Zhao; Ke Zeng; Bin Yin
Field Crops Research | 2018
Yuanlin Yao; Min Zhang; Yuhua Tian; Miao Zhao; Ke Zeng; Bowen Zhang; Meng Zhao; Bin Yin
Agriculture, Ecosystems & Environment | 2017
Min Zhang; Yuhua Tian; Miao Zhao; Bin Yin; Zhaoliang Zhu