%0 Journal Article
%T Profit and loss of nutrients in crop-fruit ecosystems<br>农果复合系统营养物质的盈亏平衡特征
%A WU Faqi
%A LIU Haibin
%A ZHOU Zhengli
%A <br>吴发启
%A 刘海斌
%A 周正立
%J 应用生态学报
%D 2006
%I 
%X The analysis on the balance of nutrient's profit and loss in crop-fruit ecosystems of three villges in middle-south Loess Plateau showed that fertilization was the main input of nutrients,of which,chemical fertilizer occupied a larger proportion,while organic manure was relatively insufficient.The quantity of N,P and K spent in interior circulation was far less than that exported from the ecosystem.The ratio of nutrient's output and input in three test villages was differed,but all at a low level.
%K Nutrient
%K Balance of profit and loss
%K Crop-fruit ecosystem
%K Loss plateau<br>营养物质
%K 盈亏平衡
%K 农果复合生态系统
%K 黄土高原
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=9C9377EE26AF0EE4&yid=37904DC365DD7266&vid=BCA2697F357F2001&iid=38B194292C032A66&sid=09AA1448D1EAF9C1&eid=1FF3CD54EFC256A1&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=5&reference_num=28