学术
摘 要:
在洛阳市郊典型蔬菜栽培区，对蔬菜保护地和小麦／玉米轮作田进行对比研究，并采用蒋一顾无机磷分级方法对土壤无机磷进行分级，以揭示蔬菜保护地土壤磷素积累、转化及有效性与棚龄的关系。结果表明，保护地土壤总磷含量随棚龄增加而不断增加，在15～17年日光温室中达到4．22g／kg；有效磷在11年棚龄左右达到最大值，此后略有下降；在低棚龄阶段，无机磷主要以速效态和缓效态组分积累，很少以难效态组分积累；在高棚龄阶段，主要以难效态组分积累，其它组分则显著下降；但棚龄对钙结合态磷与非钙结合态磷间比例没有影响。[著者文摘]
文章出处:
《干旱地区农业研究》-2008年26卷1期,36 -25-28,36页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1000-7601（2008）01-0025-04
Phosphorus accumulation and inorganic phosphorus fractions in greenhouse soils
XU Xiao-feng, MIAO Yan-fang, GUO Da-yong, JIA Xing-na （ College of Agronomy, Henan University of Science and Technology, Luoyang 471003, China ）
Abstract:
According to Jiang-Gu inorganic phosphorus fractions classification systems, the characteristic of phosphorus accumulation, inorganic phosphorus fractions and bio-availability how to change with vegetable cultivation years in greenhouse soil in Luoyang suburb were studied. The difference between greenhouse and white-corn rotation land were discussed too. The results indicated that＇while vegetable cultivation years were increased, the total phosphorus of soil was increased too. It was achieved 4.22 g/kg of total phosphorus in 15-17 years greenhouse. Available phosphorus concentration were increased too and it achieved the maximum in 11 years. The most amount phosphorus were accumulated in Ca2 - P,Cas - P,A1 - P ,Fe - P in the first 5 years, and the dominat fraction were Ca2 - P,Ca8 - P. While ＇vegetable cultivation years were increased, the amount of phosphorus accumulated in O- P,Ca10 - P were increased. And Ca10 - P was the dominant fraction. Others fractions＇ concentration were decreased while were increased. Vegetable cultivation years had no influence on propotion of calcium combined phosphorus and no calcium combined phosphorus.[著者文摘]
Key words:
greenhouse soil; phosphorus; accumulation; bio-availability; inorganic phosphorus fractions
基金资助:
河南科技大学科研启动基金（09001088）
更多>>免费文章
cqvip.com