| 覆土厚度对冬种马铃薯还田稻草腐解进程的影响 |
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| 引用本文： | 许巧玲,曹先维,高雅丽,官利兰,张新明,娄赟,叶淑华.覆土厚度对冬种马铃薯还田稻草腐解进程的影响[J].安徽农业科学,2011,39(27):16595-16597. |
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| 作者姓名： | 许巧玲 曹先维 高雅丽 官利兰 张新明 娄赟 叶淑华 |
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| 作者单位： | 1. 华南农业大学资源环境学院,广东广州,510642
2. 华南农业大学园艺学院,广东广州,510642 |
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| 基金项目： | 广东省农业科技攻关项目(2010B020315022); 现代农业产业技术体系专项(CARS-10-ES14) |
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| 摘 要： | 目的]为了探讨广东冬种马铃薯主产区覆盖还田稻草的腐解进程。方法]采用尼龙网袋法,研究水稻稻草在不同覆土深度（0、5.0、7.5和10.0 cm）对还田稻草腐解的影响。结果]覆土深度为7.5 cm时腐解速度最快,覆土深度0 cm最慢。还田60 d后,覆土深度7.5 cm的稻草残留率为50%,而覆土深度0 cm的稻草残留率为80%。稻草还田后有机碳在前10 d分解较快,稻草的全碳含量随着还田时间延长而逐渐下降,导致C/N比降低。冬马铃薯收获时覆土深度0 cm有机碳残留率为76%,覆土深度7.5、10.0和5.0 cm的有机碳残留率依次为69.3%、70.8%和72.5%。还田的前10 d稻草氮素含量呈现上升趋势,20 d后才出现下降趋势。一季马铃薯田稻草还田后稻草有机碳只释放了1/3左右。结论]稻草还田前期可以固定部分氮素,还田后期会释放一定的氮素供马铃薯生长需要。种植一季马铃薯作物后,还田的稻草并没有被完全腐解。
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| 关 键 词： | 冬马铃薯 稻草 腐解 残留率 |
Effects of Soil-Covered Depth on Decomposition of Rice Straw in Winter Potato Field |
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| XU Qiao-ling et al.Effects of Soil-Covered Depth on Decomposition of Rice Straw in Winter Potato Field[J].Journal of Anhui Agricultural Sciences,2011,39(27):16595-16597. |
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| Authors: | XU Qiao-ling |
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| Institution: | XU Qiao-ling et al(College of Natural Resources and Environment,South China Agricultural University,Guangzhou,Guangdong 510642) |
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| Abstract: | Objective] The research aimed to study the decomposition of rice straw in winter potato field.Method] Rice straw were enclosed in nylon nets and returned to potato field to study the effects of soil-covered depth(0,5.0,7.5,10.0 cm) on decomposition course.Result] Rice straw had the highest decomposition rate at soil-covered depth of 7.5 cm,and had the lowest rate at soil-covered depth of 0 cm.After decomposition for one potato growing season,the residual rate at soil-covered depth of 7.5 and 0 cm were 50... |
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| Keywords: | Winter potato Rice straw Decomposition Residual ratio |
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