Effects of Long-term Application of Bag-controlled Slow-release Fertilizer on the Form and Availability of Phosphorus in Red Soil of Southern China  

作　　者：Junyu ZHAO Bo PAN Zuoyu QIN Jian TANG Huili WANG Xiaorui HUANG Jizhao CAO 

机构地区：[1]Guangxi Zhuang Autonomous Region Forestry Research Institute,Nanning 530002,China [2]Guangxi Research and Development Center for New Forestry Fertilizer,Nanning 530002,China

出　　处：《Meteorological and Environmental Research》2022年第5期98-102,共5页气象与环境研究（英文版）

基　　金：Supported by Special Item of Basic Business Expenses of Guangxi Academy of Forestry Sciences(LINKE 202113);Forestry Science and Technology Promotion Demonstration Project of the Central Finance([2021]TG18);Special Fund Project for Innovation Driven Development in Guangxi(GUIKE AA17204087-11)。

摘　　要：The insufficient supply of phosphorus is the main problem facing agriculture and forestry production in red soil region of southern China.To investigate whether applying bag-controlled slow-release fertilizer can improve the phosphorus availability and available phosphorus component content,with Gaofeng State-owned Eucalyptus Plantations Forest Farm in Guangxi red soil region as the research object,comparative test of different fertilizer types and fertilizer amount of bag-controlled slow-release fertilizer with conventional fertilization(G1),bag-controlled slow-release fertilizer with reducing fertilization(G2),traditional compound fertilizer(G3),basal fertilizer(G4),and no fertilization(G5)was designed.Soil phosphorus classification method was used to determine the content of phosphorus components in the soil,and redundancy analysis was used to study the effects of components on tree growth.The results showed that:compared with traditional fertilization,bag-controlled slow-release fertilizer significantly increased the contents of AP,Pi,Fe-P and other components in soil;the phosphorus activation coefficients of G2 and G1 were significantly higher than those of the other three treatments,and the order was G2>G1>G4>G5>G3;redundancy analysis showed that PAC and Fe-P had the most significant effect on plant growth among all phosphorus components.The application of bag-controlled slow-release fertilizer in red soil of eucalyptus plantation in southern China could promote the accumulation of phosphorus and increase the phosphorus activity.The mechanism of higher phosphorus use efficiency in bag-controlled slow-release fertilizer was mainly through the sustained phosphorus input and reducing phosphorus immobilization in soil by obstructing the contact of phosphorus with acid soil,to guarantee the phosphorus supply in tree growth process.

关 键 词：Bag-controlled slow-release fertilizer Phosphorus components Traditional fertilization Redundancy analysis 

分 类 号：S145.6[农业科学—肥料学]