【摘要】：以秸稈焚燒后覆蓋的黑鈣土和棕壤為對象,研究秸稈焚燒對土壤理化性質(zhì)、微生物數(shù)量、脲酶活性的影響,并探討脲酶活性與土壤理化性質(zhì)及微生物間的相關性。結(jié)果表明,焚燒秸稈后,細菌和放線菌數(shù)量有一定程度的減少,真菌數(shù)量、電導率、脲酶活性有一定程度的增加;0~5 cm耕層土壤堿解氮含量幾乎沒有變化,5~10 cm耕層土壤堿解氮含量平均降低18.86%;黑鈣土有機質(zhì)含量平均下降6.37%,棕壤有機質(zhì)含量平均增加5.98%。相關分析表明,細菌與脲酶活性呈負的相關性,真菌、電導率與脲酶活性呈正的相關性。研究結(jié)果表明,焚燒秸稈對土壤肥力的改善并未起到促進作用,同時焚燒秸稈使細菌、放線菌數(shù)量降低,真菌數(shù)量增加,增加土傳病害的發(fā)病率,不利于作物生長,還降低作物產(chǎn)量。
[Abstract]:Taking black calcium soil and brown soil covered with straw incineration as objects, the effects of straw incineration on soil physical and chemical properties, microbial quantity and urease activity were studied, and the correlation between urease activity and soil physical and chemical properties and microorganisms was discussed. The results showed that after straw burning, the number of bacteria and actinomycetes decreased to a certain extent, the number of fungi, electrical conductivity and urease activity increased to a certain extent, the alkali-hydrolyzed nitrogen content of 0 鈮，

本文編號：2501732