培肥地力促进绿洲农业营养元素良性循环  

Study on Increasing Soil Fertility and Promoting Oasis Agriculture Sustainable Development

作　　者：王周琼[1] 王宝军[1] 赵岩[1] 贺瑶琴 李述刚[1] 

机构地区：[1]中国科学院新疆生态与地理研究所

出　　处：《干旱区研究》1999年第1期1-7,共7页Arid Zone Research

摘　　要：通过总结新疆培肥地力的历史经验和中国科学院阜康荒漠生态站长期定位试验成果（１９９１～１９９８），说明单施化肥则化肥利用率逐年下降，需要有机和无机肥料配合施用才能培肥地力促进营养元素良性循环。提出并确立了良性养分循环指数，用作农业生态系统能否持续发展的数量化指标。该指数是以系统内最活跃的因素养分Ｎ的两个函数乘积来表征。一个是Ｎ的产投比标志着系统的较高经济效益，另一个是有机Ｎ再循环系数，显示该系统通过有机Ｎ投入，应有较大幅度盈余，才能不断培肥地力，达到绿洲农业生态系统营养元素的良性循环。From summarizing the historical experiment result of increasing soil fertility in Xinjiang and the achievement of long-term nutrient experiments at Fukang Desert Ecological Station CAS(1991～1998),the experimentsets out that organic and inorganic fertilizer should be applied together,which can increase soil fertility,and the utilization ratio of chemical fertilizer is decreasing year by year if we just apply chemical fertilizer,and poses and establishes the index of nutrient cycle which is a quantity index and can determine whether agiculture ecosystem may be sustainable development or not.The index is characterized by product of two functions of nutrient-N that is the most active factor in the system.One is the ratio between yield and input which embodies better ecomomic performance of its system,and the other is index of organic-N re-cycling which shows that there is much surplus after inputting organic-N,and only by this can increase soil fertility continuously and nutrient elements good cycle in oasis agriculture ecosystem.

关 键 词：培肥地力 合理施肥 有机肥 养分循环 

分 类 号：S143.6[农业科学—肥料学]