湖北省苇田土壤肥力状况与地力分级

FERTILITY CONDITIONS AND QUALITY ASSESSMENT OF REED SOIL RESOURCE IN HUBEI PROVINCE

利用野外调查和室内分析相结合对湖北省苇田土壤肥力状况进行了比较分析，并对全省苇田资源进行了生产力评价。结果表明：绝大多数苇田呈碱性反应，钾素营养丰富，氮、磷养分普遍不足；长江干流苇田肥力高于支流汉江的苇田肥力。将全省苇田土壤按生产力水平分为四等，其中一等苇田占１３．８％，二等苇田占３６．７％，三等苇田占３３．２％，四等苇田占１６．３％。表明对全省苇田进行科学管理。

Reed soil fertility conditions in Hubei Province were compared and analysed, and the quality of reed soil resource was evaluated and graded through field survey and laboratory analyses. The results illustrate that chemistry reaction of the soil is weakly alkaline, the K nutrition is plentiful, whereas N and P are insufficient in most parts of the reed fields in Hubei province. The fertility level of the reed fields in Yangtze River basin is higher than that in Hanjiang River basin. The productivity level of the reed fields in Hubei province is low generally; among the whole reed fields in the province, first-class fields constitute only 13.8%, second-class fields 36.7%, third-class fields 33.2%, and the fourth-class fields account for 16.3%. So, if the reed fields in the whole province are managed scientifically and adequate input is given, the yield and economic benefit of the reed fields would be raised greatly.