连作年限对蕉园土壤氮磷钾养分的影响  

Effect of continuous banana-cropping on soil N,P and K nutrients

作　　者：钟爽[1] 何应对[1] 韩丽娜[1] 周兆禧[1] 臧小平[1] 王必尊[1] 金志强[1] 

机构地区：[1]中国热带农业科学院海口实验站,海南海口570102

出　　处：《广东农业科学》2011年第23期64-67,共4页Guangdong Agricultural Sciences

基　　金：中央级公益性科研院所基本科研业务费专项(sscri201004;ITBBKF2008-2);海南省自然科学基金(310073);国家现代农业产业技术体系建设专项(CARS-32)

摘　　要：通过采集不同连作年限(1年、3年、5年、7年、10年和15年)的蕉园土壤,研究蕉园土壤养分的动态变化规律。结果表明:随着连作年限的增加,土壤有机质和pH值出现不同程度的下降,全磷、全钾、速效磷、速效钾、除苗期之外的铵态氮、抽蕾期和成熟期的全氮和硝态氮含量均出现不同程度的累积。由此可见,长期连作改变了蕉园土壤中的养分比例,导致土壤中大量元素比例失调,从而影响香蕉的生长。Changes of soil nutrients were studied on banana plantations under different continuous cropping years （1 a,3 a, 5 a, 7 a, 10 a and 15 a）. Results indicated that total organic C and pH decreased with the increase of continuous cropping years. Total P, total K, available P, available K in four growing stages, NH4-N except seedling stage and total N and NO3-N in jointing and booting stages appeared different degree of enrichment with the increase of continuous cropping years. The results ＇above indicate that long-term continuous cropping has changed the ratios of soil nutrients and affected the growth of banana in continuous banana-cropping field.

关 键 词：蕉园 连作 土壤养分 

分 类 号：S158.3[农业科学—土壤学]