摘要
分析了烤烟不同连作年限的土壤养分含量。结果表明烤烟连作1～2年的烟田土壤养分与正茬比较变化不大,而连作2年后,土壤中全氮、速效钾含量减少,全磷、碱解氮和速效磷含量增加,有机质含量下降,pH值有所升高;连作3年和4年时烤烟各生育期的土壤全磷和速效磷含量均处于较高水平,显著高于其它3个茬口,连作4年的土壤缓效钾含量高于其它茬口。
The nutrients in the soils with different years of succession cropping of flue-cured tobacco were analyzed. The results showed that the nutrients in the soil after one to two years succession cropping of flue-cured tobacco differed little from that of normal crops, the contents of total N, available K and organic matter were reduced after three or four years succession cropping, while the contents of total P, alkali-hydrolyzable N, available P and pH value were increased, and the contents of total N and available P were obviously higher. After 4 years of succession cropping, the content of slow-release K was higher.
出处
《烟草科技》
EI
CAS
2004年第9期40-42,共3页
Tobacco Science & Technology
基金
黑龙江烟草公司资助项目"烤烟重茬障碍因子的研究与解决对策"的一部分(990002)。
关键词
烤烟
连作
土壤养分
Flue-cured tobacco
Succession cropping
Soil nutrients
