Effects of Long-Term Application of Sulfur-Containing and Chloride-Containing Chemical Fertilizers on Rice Yield and Its Components
文献类型: 外文期刊
第一作者: Shen Pu
作者: Shen Pu;Li Dong-chu;Gao Ju-sheng;Xu Ming-gang;Wang Bo-ren;Hou Xiao-juan
作者机构:
关键词: rice (Oryza saliva L.);long-term fertilization;sulfur-containing fertilizer;chloride-containing fertilizer;yield;component
期刊名称:AGRICULTURAL SCIENCES IN CHINA ( 影响因子:0.82; 五年影响因子:0.997 )
ISSN: 1671-2927
年卷期: 2011 年 10 卷 5 期
页码:
收录情况: SCI
摘要: Impacts of 33-yr of application of S-containing and Cl-containing chemical fertilizers on rice (Otyza sativa L.) yield and its components were investigated in a red paddy field experiment, south China. The treatments included: 1) adding 302 kg SO(4)(2-)-S ha(-1) yr(-1) with application of (NH(4))(2)SO(4), K(2)SO(4), and calcium superphosphate (SO(4)(2-)); 2) adding 56 kg SO(4)(2-)-S and 176 kg Cl ha(-1) yr(-1) with application of urea, calcium superphosphate, and KCl (C1-+SO(4)(2-)); 3) adding 516 kg Cl ha(-1) yr(-1) with application of NH(4)Cl, KCl, and KH(2)PO(4) (Cl-). Under each treatment, the applied N, P, and K nutrients were controlled at conventional rates of 150 kg N ha(-1) yr(-1), 75 kg P(2)4O(5) ha(-1) yr(-1), 225 kg K(2)O ha(-1) yr(-1), respectively. Under the S-containing fertilizer application, soil SO(4)(2-)-S content showed a first increasing then decreasing trend with years, and was significantly negatively correlated with annual rice yield. Average annual yield significantly declined in an order of Cl-, C1-+SO(4)(2-), and SO(4)(2-). Under the Cl- treatment, soil SO(4)(2-)-S content was maintained at about 26.5 mg kg(-1), not showing deficiency. From 1990 to 2000, rice yield declined rapidly under the SO(4)(2-) treatment, and was significantly lower than that under the Cl-treatment. After then, there was no significant difference in yield among the treatments. Our results demonstrated that long-term application of S-containing fertilizer could result in excessive accumulation of SO(4)(2-)-S in the red paddy soils of south China, therefore producing a certain threat to rice growth. The Cl-containing fertilizer could be relatively safe.
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