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当前位置: 首页 > 文章 > 连续秸秆还田对水稻土中钾素形态的影响 土壤通报 2017 (2) 351-358
Position: Home > Articles > Effect of Continuous Straw Incorporation on Forms of Potassium in the Paddy Soils Chinese Journal of Soil Science 2017 (2) 351-358

连续秸秆还田对水稻土中钾素形态的影响

作  者：
殷志遥;黄丽;薛斌;黄雅楠;李小坤;鲁剑巍
单  位：
华中农业大学农业部长江中下游耕地保育重点实验室
关键词：
秸秆还田;土壤钾素;有机质;pH
摘  要：
湖北省武穴市、荆州市和武汉市三个水旱轮作长期定位试验的基础上,研究了连续秸秆还田(三地秸秆还田时间分别为9、5和3年)对不同层次(0~20 cm和20~40 cm)土壤中各形态钾素(水溶性钾、特殊吸附钾、非特殊吸附钾、非交换性钾、矿物钾、全钾)的影响。结果表明:秸秆还田能显著增加0~20 cm土层中特殊吸附钾和非特殊吸附钾的含量,两者的增量分别为9.92%~138.35%和35.57%~143.79%,其中武穴试验点的增加效果相对最好。20~40 cm土层,各处理之间变化规律不明显。土壤全钾含量表现为武穴试验点最低(2.59~3.15 g kg~(-1)),与荆州和武汉试验点差异性较大(9.45~11.91 g kg~(-1))。武穴和荆州试验点供钾能力较低(速效钾含量<100 mg kg~(-1)),武汉试验点供钾能力为中等(速效钾含量在100~150 mg kg~(-1))。矿物钾和全钾呈极显著正相关(武穴、荆州和武汉试验点的相关系数分别为0.994**、0.999**、1.000**),速效钾中各组分与速效钾的相关性在三个试验点存在差异,其中还田时间越长相关性越好。
译  名：
Effect of Continuous Straw Incorporation on Forms of Potassium in the Paddy Soils
作  者：
YIN Zhi-yao;HUANG Li;XUE Bin;HUANG Ya-nan;LI Xiao-kun;LU Jian-wei;Key Laboratory of Arable Land Conservation, Middle and Lower Reaches of Yangtze River, Ministry of Agriculture,Huazhong Agricultural University;
关键词：
Straw returning;;Soil potassium;;Organic matter;;pH
摘  要：
Based on the long-term experiments in Wuxue, Jingzhou and Wuhan of Hubei Province, the present study investigated the long-term effect of continuous straw returning(9, 5 and 3 years respectively) under different crop rotation system on various forms of potassium(K, including water soluble K, specifically absorptive K, non-specifically absorptive K, non-exchangeable K, mineral K, total K) in the different soil layers(0-20 cm and 20-40 cm).Results showed that straw returning increased the contents of soil specifically absorptive K and non-specifically absorptive K with the increment of 9.92%-138.35% and 35.57%-143.79%, respectively, in 0-20 cm layer. This increase effect was relatively most in Wuxue. No significant differences among treatments were observed in the 20-40 cm soil layer. Soil total K concentration was the lowest(2.59-3.15 g kg~(-1)) in Wuxue, and its differences between Jingzhou and Wuhan(9.45-11.91 g kg~(-1)) was significant. The supply capacity of soil K was low in Wuxue and Jingzhou(available K content < 100 mg kg~(-1)) and was middle in Wuhan(available K content of 100-150 mg kg~(-1)).Correlation between mineral K and total K was extremely significant and the correlation coefficient was, respectively,0.994**, 0.999**, 1.000**in soils of Wuxue, Jingzhou and Wuhan. There were differences in the correlation between available K and available K among the three experimental sites. And the longer the term of straw returning was, the better the correlation was.

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