中国农业科学2026，Vol.59Issue(7)：1480-1491,12.DOI:10.3864/j.issn.0578-1752.2026.07.008
紫云英与稻草联合利用对南方稻区土壤磷库组成及磷素活化的影响
Effects of Co-Utilization of Chinese Milk Vetch and Rice Straw on Soil Phosphorus Composition and Phosphorus Activation of Paddy Field in Southern China
摘要
Abstract
[Objective]Chinese milk vetch(Astragalus sinicus L.)and rice straw are high-quality organic resources in southern rice-growing regions.Their combined application plays a significant role in enhancing rice yield and improving soil fertility.However,the specific processes and mechanisms by which this practice activates insoluble phosphorus(P)in the soil remain unclear.This study systematically investigated the effects of combined incorporation of Chinese milk vetch and rice straw on soil P fraction composition,P activation coefficient,and rice P accumulation in paddy fields,aiming to provide the theoretical support for promoting this practice and managing P nutrients.[Method]Long-term field positioning experiments were conducted in Hunan,Jiangxi(initiated in 2016),and Guangxi(initiated in 2019).Four treatments were established:(1)Winter fallow+Conventional fertilization(F);(2)Chinese milk vetch incorporation+Conventional fertilization(FM);(3)Winter fallow+Rice straw return+Conventional fertilization(FS);(4)Chinese milk vetch incorporation+Rice straw return+Conventional fertilization(FMS).After early rice harvest,soil samples(0-20 cm plough layer)were collected.Soil P fractions and phosphatase activities were measured.The soil P activation coefficient was calculated.Actual rice yield was recorded,and rice P accumulation was calculated.[Result]Compared with the F treatment,the FMS treatment increased grain yield by 9.7％-29.5％and rice P accumulation by 20.6％-51.4％across the three experimental sites.The FMS treatment significantly increased the proportion of the active P pool in the total soil P pool by 13.5％-30.1％,while decreasing the proportion of the stable P pool by 2.3％-6.0％.Specifically,compared with the F treatment,the FMS treatment primarily increased the content of inorganic P fractions:NaHCO3-Pi and NaOH-Pi increased by 13.5％-33.3％and 10.7％-17.4％,respectively.Furthermore,the soil P activation coefficient under FMS increased by 5.4％-18.2％.Soil phosphatase activities were also significantly enhanced,compared with the F treatment,acid phosphatase activity and alkaline phosphatase activity increased by 2.1％-21.5％and 2.2％-26.3％,respectively,thereby promoting organic P mineralization.[Conclusion]Long-term combined incorporation of Chinese milk vetch and rice straw enhanced soil P availability by increasing the content of active P forms and boosting phosphatase activity.Compared with their individual application,the combined use of Chinese milk vetch and rice straw further improved soil P fertility,promoted rice P uptake,and consequently achieved synergistic growth in rice yield.关键词
紫云英/稻草/有效磷/磷形态/磷酸酶活性/南方稻区Key words
Chinese milk vetch/rice straw/Olsen-P/phosphorus fractions/phosphatase activity/paddy field in Southern China引用本文复制引用
袁浩亮,聂军,黎鹏,鲁艳红,廖育林,徐昌旭,李忠义,曹卫东,张江林..紫云英与稻草联合利用对南方稻区土壤磷库组成及磷素活化的影响[J].中国农业科学,2026,59(7):1480-1491,12.基金项目
国家自然科学基金(32202607)、湖南省自然科学基金(2023JJ40391)、湖南省农业科技创新资金项目(2024CX41,2024CX104) （32202607）
