论文部分内容阅读
玉米对锌敏感。土壤缺锌玉米表现的主要症状是叶片失绿,光合作用减弱,节间缩短,生长受阻,产量下降。河北省耕地低锌土壤(有效锌<0.5ppm)面积约占70%。玉米的种植面积约占粮食作物播种面积的四分之一。研究玉米的缺锌临界值、锌肥的施用方法与肥效,在生产
Corn is sensitive to zinc. The main symptom of Zn-deficient maize was leaf chlorosis, weakened photosynthesis, shortened internodes, impaired growth and decreased yield. Hebei Province, arable land low-zinc soil (effective zinc <0.5ppm) area accounts for about 70%. Corn acreage accounts for about one-quarter of the sown area of food crops. Study of corn critical value of zinc deficiency, zinc fertilizer application methods and fertilizer efficiency in the production