白浆型参地土壤氮素营养供应状况的研究  

^Study on Nitrogen Mineralization Potentials of Albric Ginseng Soil

作　　者：宋健国[1] 李楠[1] 刘伟[1] 刘兆荣[1] 窦森[1] 

机构地区：[1]吉林农业大学土化系

出　　处：《吉林农业大学学报》1995年第4期44-48,共5页Journal of Jilin Agricultural University

基　　金：国家自然科学基金;吉林省科委资助

摘　　要：采用Ｓｔａｎｆｏｒｄ－Ｓｍｉｔｈ好气培养间歇淋洗法，研究了床土氮素的潜在供应能力。结果表明，累积矿化氮量（Ｎｔ）与时间的平方根（ｔ１／２）呈很好的线性相关（ｒ２＝０．９７～０．９９，ｎ＝１４），两者的直线斜率随床土肥力的增高而逐渐升高。１４种床土的矿化速率常数（Ｋ）为０．００７４～０．０９３，其间无显著差异，矿化半时值（ｔ１／２）为５７．７５±４．９７（ｄ），平均每天释放出１．２％的可矿化氮。～０．９９，ｎ＝１４）．Ｔｈｅｓｌｏｐｅｓｉｎｃｒｅａｓｅｄｗｉｔｈｔｈｅｉｎｃｒｅａｓｅｄｏｆｆｅｒｔｉｌｉｔｙｌｅｖｅｌｉｎｇｉｎｓｅｎｇｓｏｉｌ．Ｔｈｅｍｉｎｅｒａｌｉｚａｔｉｏｎｒａｔｅｃｏｎｓｔａｎｔｓ（Ｋ）ｏｆｔｈｅｓｅ１４ｇｉｎｓｅｎｇｓｏｉｌａｒｅｆｒｏｍ０．００７４ｔｏ０．０９３．Ｔｈｅｒｅｗｅｒｅｎｏｄｉｆｆｅｒｅｎｔａｍｏｎｇｔｈｅｒａｔｅｃｏｎｔａｎｔｓ．ＴｈａｔｓｈｏｗｓｔｈｅｍｉｎｅｒａｌｉｚａｂｌｅＮｉｓｒｅｌｅａｓｅｄａｔａｎａｖｅｒａｇｅｒａｔｅｏｆ１．２％ｐｅｒｄａｙ．Ｋｅｙｗｏｒｄｓ：ｇｉｎｓｅｎｇｓｏｉｌ；ｎｉｔｒｏｇｅｎ－ｓｕｐｐｌｙ；The results indicated that cumulative net N mineraihation (N1) was linearly related to the sequare root of time t1/2, (r2=0. 97**～0. 99**, n=14). The slopes increased with the increased of fertility level in ginseng soil. The mineralization rate constants (K) of these 14 ginseng soil are from 0. 0074 to 0. 093. There were no different among the rate contants. That shows the mineralizable N is released at an average rate of 1. 2% perday.

关 键 词：人参 土壤 氮素 矿化 白浆型 

分 类 号：S567.510.6[农业科学—中草药栽培]