Crop yields and soil organic carbon dynamics in a long-term fertilization experiment in an extremely arid region of northern Xinjiang, China

文献类型： 外文期刊

第一作者： Lyu Jinling

作者： Lyu Jinling;Tian Changyan;Lyu Jinling;Lyu Jinling;Liu Hua;Wang Xihe;Olave, Rodrigo;Liu Xuejun

作者机构：

关键词： long-term fertilization experiment;extremely arid conditions;soil organic carbon;organic C inputs;Xinjiang

期刊名称：JOURNAL OF ARID LAND （ 影响因子：2.299； 五年影响因子：2.459 ）

ISSN： 1674-6767

年卷期： 2017 年 9 卷 3 期

页码：

收录情况： SCI

摘要： A long-term fertilization experiment was set up in northern Xinjiang, China to evaluate the dynamics of crop production and soil organic carbon (SOC) from 1990 to 2012 with seven fertilization treatments. The seven treatments included an unfertilized control (CK) and six different combinations of phosphorus (P), potassium (K), nitrogen (N), straw (S) and animal manure (M). The balanced fertilization treatments had significantly (P < 0.05) higher average yields than the unbalanced ones. The treatment with 2/3 N from potassium sulfate (NPK) and 1/3 N from farmyard manure (NPKM) had a higher average yield than the other treatments. The average yields (over the 23 years) in the treatments of NPK, and urea, calcium superphosphate (NP) did not differ significantly (P > 0.05) but were higher than that in the treatment with urea and potassium sulfate (NK; P < 0.05). The results also show that the highest increases in SOC (P < 0.05) occurred in NPKM with a potential increase of 1.2 t C/(hm(2).a). The increase in SOC was only 0.31, 0.30 and 0.12 t C/(hm(2).a) for NPKS (9/10 N from NPK and 1/10 N from straw), NPK and NP, respectively; and the SOC in the NP, NK and CK treatments were approaching equilibrium and so did not rise or fall significantly over the 23-year experiment. A complete NPK plus manure fertilization program is recommended for this extremely arid region to maximize both yields and carbon sequestration.

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