摘要
土壤施肥可以影响植物的生长和营养状况,从而影响植食性昆虫的生长发育、繁殖和为害等。在影响植物抗性和害虫为害的营养因子中,氮是一个关键的因素,氮肥对害虫发生的影响取决于害虫种类、植物种类和土壤肥力,是植物营养质量对害虫直接影响的结果,也是植物形态学、组织发育等因素的间接作用结果。很多研究表明土壤或植物中氮水平与害虫密度存在强烈正相关关系,但是也有不同情况出现。另外其他营养元素如磷和钾,也会引起害虫种群动态变化。有机管理措施可能有利于减轻害虫发生,但是机理还存在争议。
Soil fertilization can influence the growth and nutritional status of plants, thus can affect the development, reproduction and damage of herbivorous insects. Among the nutritional factors which can influence plant resistance and herbivores damage, N is considered to be the most important and limiting factor. Impacts of N fertilizer on herbivores depend on the species of both insects and plants and soil fertility, it＇s the comprehensive results of plant nutritional quality＇s direct affect on herbivores and also the indirect effects of plant morphology, tissue development etc. on herbivores. Many studies indicated that N level in soils or plants had a strong positive correlation with herbivores density, but there were still different situations. Other nutrients such as P and K, can also cause the changes in population dynamics of herbivores. Organic management measures may reduce herbivores infection, but the mechanism is still controversial.
出处
《土壤》
CAS
CSCD
北大核心
2012年第5期719-726,共8页
Soils
基金
国家农业科技成果转化资金项目(2009GB24910540)
国家公益性行业(农业)科研专项经费项目(200903011)
中国科学院创新方向项目(KZCX2-YW-JC405)资助
关键词
土壤施肥
害虫
为害
种群动态
氮磷钾
Soil fertilization, Herbivores, Infestation, Population dynamics, NPK
