Long-term straw incorporation benefits the elevation of soil phosphorus availability and use efficiency in the agroecosystem

文献类型： 外文期刊

第一作者： Guo, Zhibin

作者： Guo, Zhibin;Hua, Keke;Wang, Daozhong;He, Chuanlong;Guo, Zhibin;Guo, Zhibin;Hua, Keke;Wang, Daozhong;He, Chuanlong;Liu, Hui

作者机构：

关键词： crop management; Fertilization; phosphorus fertilizer use efficiency; wheat straw

期刊名称：SPANISH JOURNAL OF AGRICULTURAL RESEARCH （ 影响因子：1.238； 五年影响因子：1.731 ）

ISSN： 1695-971X

年卷期： 2018 年 16 卷 3 期

页码：

收录情况： SCI

摘要： Soil pH and organic matter arc important factors influencing phosphorus (P) fertilizer use efficiency. Long-term crop straw incorporation alters soil pH and soil organic matter. To explore the influence of crop straw incorporation on P fertilizer use efficiency, this research was conducted in a long-term field experiment (30 years) with a wheat-soybean cropping system and selected four treatments: no fertilization, mineral fertilization (NPK), mineral fertilization + 3750 kg/ha wheat straw (WS/2-NPK) and mineral fertilization + 7500 kg/ha wheat straw (WS-NPK). Results show that long-term straw incorporation not only accentuates soil acidification, but also elevates crop yields and soil P availability. Consequently, compared with the NPK treatment, straw incorporation contributed to higher P fertilizer use efficiency, which increased from 43% in 1983 to 72% in 2012 for WS/2-NPK, from 46% to 69% for WS-NPK, and from 34% to 60% for NPK treatments, respectively. Moreover, the P fertilizer use efficiency in all fertilization treatments could be categorized as follows: slowly increasing stage in 1982-2002, stable stage in 2003-2006, and rapidly increasing stage in 2007-2012. Correspondingly, the annual P balances of the WS/2-NPK and WS-NPK treatments ranged from positive to negative in the 1982-2003 and 2004-2012. Therefore, compared with mineral fertilization alone, long-term wheat straw incorporation has the associated benefit of elevating the P fertilizer use efficiency. However, to maintain sustainable high crop productivity, it is necessary to elevate the dose of P fertilizer input and reduce the soil acidification under wheat straw incorporation.

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