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研究了保护性耕作方式下土壤化学、生物学特性及其相互关系。结果表明,保护性耕作能显著增加微生物数量,增强土壤酶活性,提高土壤养分含量。不同的保护性耕作方式下,土壤微生物数量、酶活性和养分含量存在显著差异。土壤细菌、真菌、固氮菌、纤维素分解菌数量与土壤大部分养分含量呈极显著正相关,土壤放线菌数量与土壤养分含量之间没有明显的相关性;过氧化氢酶活性与全P、全N、速效K、碱解N含量呈极显著正相关;蔗糖酶活性与土壤有机质、碱解N、速效P含量达极显著正相关,而与全N、速效K的含量呈显著正相关;脲酶活性只与全N和碱解N的含量呈极显著正相关,而与土壤中其他的养分含量之间无相关性。
Soil chemistry, biological characteristics and their relationships under conservation tillage were studied. The results showed that conservation tillage could significantly increase the number of microorganisms, enhance soil enzyme activity and increase soil nutrient content. Under different types of conservation tillage, soil microbial quantity, enzyme activity and nutrient content were significantly different. Soil bacteria, fungi, azotobacter, cellulolytic bacteria and soil nutrients most significant positive correlation between the number of soil actinomycetes and soil nutrient content was not significantly correlated; catalase activity and the whole P , Total N, available K and alkaline N content. Sucrase activity was significantly and positively correlated with soil organic matter, alkaline hydrolysis N and available P, but positively correlated with total N and available K ; Urease activity only with the total N and alkaline hydrolysis of N content was extremely significant positive correlation with other soil nutrients and no correlation.