水土保持学报2017，Vol.31Issue(4)：148-153,204,7.DOI:10.13870/j.cnki.stbcxb.2017.04.024
稻田植茶后土壤团聚体水稳性变化特征及影响因素分析
Research on the Water Stability and the Driving Forces of Soil Aggregate After Paddy Field Switched to Tea Garden
摘要
Abstract
Adopting field investigation and indoor analysis,the changes of soil waterstable aggregates distribution and the driving forces in the conversion of paddy field to tea garden were examined.The results showed that soil water-stable aggregate in the paddy field and tea garden was different among different size class and soil layer.With the decrease of the particle size,the water-stable aggregate firstly decreased and then increased in paddy soil and tea plantation with 5 years,10 years.In the 15 years tea garden,water-stable aggregate was increased with the decrease of the particle size.With the increasing years of tea planation,water-stable aggregate was given priority to ＞2 mm turn into ＜0.25 mm both in 0-20 cm and 20-40 cm soil layer,while ＜0.25 mm water-stable aggregate was the predominant contributor in 40-60 cm soil layer.The water stability of soil aggregate decreased with the increasing years both in 0-20 cm and 20-40 cm soil layer,whereas the ranking from high to low in 40-60 cm soil layer was:tea plantation 5 years＞tea plantation 10 years＞paddy field＞ tea plantation 15 years.The stability water of soil aggregate was positively correlated with the content of ＞0.25 mm water-stable aggregate.The water stability of soil aggregates was positively correlated with the soil chemical properties,and the main driving factors were ＞0.25 mm aggregates,soil bulk density and total porosity.In terms of nutrients,the driving forces of water stability in paddy field,tea garden 5 years,10 years and 15 years were organic matter,organic matter and CEC,organic matter,CEC and effective phosphorus content,content of CEC,respectively.关键词
土壤/团聚体/水稳性/稻田植茶/种植年限Key words
soil/aggregate/water stability/paddy field switched to tea garden/planting years分类
农业科技引用本文复制引用
李欣雨,夏建国,田汶艳..稻田植茶后土壤团聚体水稳性变化特征及影响因素分析[J].水土保持学报,2017,31(4):148-153,204,7.基金项目
四川省学术和技术带头人培养基金项目(2014) （2014）
四川农业大学学科建设双支计划项目(2016) （2016）
