To explore the combined application effects of bentonite and bacillus on the release and retention of nitrogen,phosphorus and potassium nutrients in sandy soil,field in-situ and indoor leaching experiments were conducted.Additionally,the effects of two modes(single application of bentonite and mixed application of bentonite and bacillus)on the basic physical and chemical properties of sandy soil,profile nutrient status,and different addition levels of bentonite(0.50%,1.00%,and 3.00%)on the leaching of sandy soil nutrients were explored.The results showed that the three bentonite addition levels significantly increased the moisture content of sandy soil by 32.14%-99.41%.The mixed application of bentonite+bacillus steadily increased the soil available nutrient content,especially in the 3.00%treatment group,which increased by 56.76%-87.24%.Bentonite reduced the leaching of soil available nutrients and enhanced soil fertility.The 3.00%treatment significantly reduced the leaching loss of soil available potassium by 46.38%.In sandy soils,bentonite combined with bacillus can enhance the effectiveness of soil moisture and nutrients and the 3.00%bentonite combined with bacillus can increase the content of available phosphorus and potassium.
关键词
毛乌素沙地/膨润土/芽孢杆菌/理化性质/土柱淋溶
Key words
Mu Us Sandy Land/bentonite/bacillus/physicochemical property/soil column leaching
维普
万方数据