摘要
通过3年的系统追踪调查及叶片营养分析,证明陕西汉中地区多数桔园施肥不足,叶片中氮、磷、钾的含量低于标准水平。当每株施纯氮0.55kg或施钾量在0.1kg以上时炭疽病发生较轻,产量相应也高;当施氮量和施钾量低于0.25kg和0.1kg以下时炭疽病则严重发生。施氮、钾肥的多少与炭疽病发生程度呈曲线相关。另外,还证明夏季施肥比单施秋肥有明显的增产抗病作用。
Having made a systematic tracing investigation and leaf nourishment analysis for 3 years, it is found that the N, P, K content in the leaves are lower than the standard level in most tangerine orchards in Hanzhong Prefecture because of inadequate fertilization. When a plant receives more than 0.55kg N and 0.1kg K, citrus anthrax (Coleelotrichum gloeosporioides Penz.)will occur fewer and the yield will be higher; but when a plant recieves N less than 0.25kg and K less than 0.1kg, disease will become serious and the yield will be low. The application quantity of N,K are of appearant nonlinear interrelation to citrus anthrax . The yield was higher and disease occued fewer when applying fertilizer in summer and autumn than only in autumn.
出处
《陕西农业科学》
北大核心
1992年第4期4-7,共4页
Shaanxi Journal of Agricultural Sciences
关键词
柑桔
施肥
炭疽病
Citrus
Fertilizing plan
Anthrax
