塔里木河上游不同林地土壤养分和微生物以及酶活性变化初探

对塔里木河上游果林地和胡杨林地土壤养分、微生物数量和酶的活性变化进行了研究。结果表明:4种特色果林地的土壤养分、微生物的数量、土壤酶活性均高于胡杨林,而胡杨林的耐盐性最强。5种林地土壤微生物的数量,从4-8月不断上升,8月份达峰值,且以细菌占绝对优势。土壤中脲酶、过氧化氢酶、碱性磷酸酶活性从4-10月逐渐上升,表现为"秋高型",10月达峰值,而转化酶活性则相反,表现为"春高型",峰值出现在4月。土壤微生物数量和土壤酶活性与土壤养分密切相关。

Preliminary Study on Soil Nutrients, Microorganisms and Enzyme Activities of Characteristic Fruit Tree and Populus euphratica Stands in Upriver of Tarum river

The soil nutrient, soil microorganisms and soil enzyme activities of soil under five different stands in Alar were studied. The results showed that the soil nutrients, soil microorgamisms and soil enzyme activities of soil four stands are all higher than the Populus euphratica stands. But the Populus euphratica stands is of the strongest anti-salty. The number of soil microorganisms in five stands was increasing from April to August, there is a maximum in August and bacteria were predominant. The urease, catalase, alkaline phosphatase activities of soil were "increase in fall". The maximum is in October, but the investase activities are opposite and the maximum is in April. There is close correlation between soil microorganisms and soil enzyme activities, soil nutrients.