摘要
通过实验,研究了种植年限不同的3种苜蓿地0～10cm和10～20cm土层的土壤微生物数量、微生物量碳、微生物量氮、基础呼吸强度、代谢商和微生物生物量商(qMB,qCO2)。结果表明,微生物数量在不同年限苜蓿地之间有不同的变化。微生物量碳、微生物量氮指标显示土壤质量4年生苜蓿地>1年生苜蓿地>2年生苜蓿地,基础呼吸强度和代谢商指标显示土壤质量4年生苜蓿地>2年生苜蓿地>1年生苜蓿地。在不施肥的条件下,4年生苜蓿地土壤质量最好,表明苜蓿种植时间越长,对土壤肥力影响越大。
After carrying out an experiment, the qMB and qCO values, quantity, biomass-C, biomass-N and respiration strength of soil microorganisms in the fields of different-year-aged Medicago sativa at different soil depths （0-10cm and 10-20cm） are researched. The results show that the microbial quantities are different in the fields of different-year-aged Medicago sativa. The biomass-C and biomass-N of soil microorganisms reveal that the soil quality is in an order of the field of4-year-aged Medicago sativa 〉 field of 1-year-aged Medicago sativa 〉 field of 2-year-aged Medicago sativa, and the respiration strength and qMB and qCO values of soil microorganisms reveal that the soil quality is in an order of the field of 4-year-aged Medicago sativa 〉 field of 2-year-aged Medicago sativa 〉 field of 1-year-aged Medicago sativa. Under the conditions without fertilization, the soil quality in the field of 4-year-aged Medicago sativa is the highest, which reveals that the soil fertility in the fields of Medicago sativa is increased with prolonging the planted time ofMedicago sativa.
出处
《干旱区地理》
CSCD
北大核心
2006年第1期115-119,共5页
Arid Land Geography
基金
新疆科技厅基金项目(2002231101)
土壤学自治区重点学科基金资助
关键词
苜蓿
土壤微生物
微生物量碳
氮
微生物商值
土壤质量
Medicago sativa
soil microorganism, biomass-C： biomass-N, microbial quotient
soil quality
