| 辽西北半干旱区垄膜沟种处理对土壤钾吸附/解吸特性的影响 |
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| 引用本文： | 冯晨,孙占祥,冯良山,王鹏飞,于秀捷,郑家明.辽西北半干旱区垄膜沟种处理对土壤钾吸附/解吸特性的影响[J].中国土壤与肥料,2016(2):45-49. |
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| 作者姓名： | 冯晨 孙占祥 冯良山 王鹏飞 于秀捷 郑家明 |
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| 作者单位： | 1. 辽宁省农业科学院耕作栽培研究所,辽宁 沈阳,110161;2. 辽宁省气象信息中心,辽宁 沈阳,110016 |
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| 基金项目： | 国家科技支撑计划项目(2012BAD09B02),辽宁省科技攻关项目(2014213004),农业部公益性行业科研专项资金项目(201203031-07-02),辽宁 "百千万人才工程" 培养经费资助项目(2013921058) |
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| 摘 要： | 为探明不同垄膜沟种处理(垄覆膜沟不覆盖T1和垄覆膜沟覆膜T2)对土壤钾吸附/解吸特性的影响,以农业部阜新农业环境与耕地保育科学观测实验站为平台,通过定位7年的田间试验(2007~2013年),以传统种植(T0)为对照,结合实验室内批量平衡法,对长期垄膜沟种条件下根际土壤对重要养分钾的吸附/解吸能力进行研究和分析。结果表明:垄膜沟种处理有助于降低土壤对钾素养分的吸附,通过拟合Langmuir方程和Freundlich方程所求得的最大缓冲容量(MBC)和Kf值等相关参数可知,垄覆膜沟不覆盖种植处理下土壤对钾的吸附容量和吸附强度最小,最有利于削弱土壤对钾的吸附作用,减少钾的固定,各处理MBC值表现为T1(6.62)T2(8.53)T0(16.31),且差异达显著水平(P0.05)。垄膜沟种处理土壤对钾的解吸量也大于传统种植处理。不同处理土壤对钾解吸能力(解吸率%)表现为T2(49.34)T1(47.48)T0(42.51),平均滞后系数表现为T0(0.57)T1(0.53)T2(0.51)。其中垄覆膜沟覆膜处理的解吸率和滞后系数总体表现为最大和最小,说明该处理土壤所吸附的钾最容易被释放。
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| 关 键 词： | 垄膜沟种 钾 吸附特征 解吸特征 |
| 收稿时间： | 2014/12/28 0:00:00 |
| 修稿时间： | 2015/2/18 0:00:00 |
Effect of ridge with film mulching and furrowed seeding systems on soil K sorption desorption characteristics in semi arid region of northwest Liaoning province |
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| Abstract: | To clarify soil K adsorption-desorption characteristics in different treatments of ridge with film mulching and furrowed seeding system in semiarid area in Liaoning, a field study was conducted from 2007 to 2013 at Fuxin Science Observation Re-search Stations of Agricultural Environment and Cultivated Land Conservation, including the treatments of ridge with film mulc-hing and furrow seeding ( furrow was uncovered, T1 ) , both ridge and furrow with film mulching ( T2 ) , and the traditional planting (T0). Laboratory experiment was combined to analyze the effects of ridge with film mulching and furrowed seeding system on soil K adsorption-desorption. The results indicated that T1 and T2 restrained the soil K adsorption according to the Langmuir and Freundlich equation parameters such as MBC and Kf, compared with that of T0. The buffer capacity and intensi-ty of K sorption in T1 treatment was the minimum among all the treatments. And the MBC value were: T1 ( 6.62 ) T1 ( 47.48 ) >T0 ( 42.51 ) , hysteresis coefficient was T0 (0.57) >T1 (0. 53) >T2 (0. 51). Soil K in T2 was most easily to be released. |
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| Keywords: | ridge with film mulching and furrowed seeding K adsorption characteristic desorption characteristic |
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