摘要
采用田间小区试验和大田对比试验的方法，对木薯的营养规律、平衡施肥中的ＮＰＫ比例及最隹施肥量进行了多年的研究。结果表明：木薯生长从土壤中带走的Ｎ∶Ｐ∶Ｋ∶Ｃａ∶Ｍｇ比例为１∶０．１∶０．６５∶０．４１∶０．１９，块根中Ｎ∶Ｐ∶Ｋ∶Ｃａ∶Ｍｇ为１∶０．２∶１．９∶０．３∶０．２；在花岗岩砖红壤上木薯平衡施肥适宜的Ｎ∶Ｐ２Ｏ５∶Ｋ２Ｏ比例为２∶１∶３或２∶１∶２，最隹的施肥量为４５０ｋｇ／ｈｍ２。
The nutrition characteristic and balanced fertilization as well as N P K ratios and fertilizer requirement for cassava had been studied for many years by the methods of field plot and larger scale field contrast . The results showed that the nutrition ratios were 1:0 1:0 65: 0 41:0 19 of N,P,K,Ca,Mg uptake from soil by cassava, and the ratios of N,P,K,Ca,Mg in storage root were 1∶0 2∶1 9∶0 3∶0 2. The optimum ratios of N,P 2O 5,K 2O for cassava balanced fertilization were 2∶1∶3, the fertilizer requirement for cassava was 450 kg·hm -2 .
出处
《广西农业生物科学》
CSCD
1999年第3期176-180,183,共6页
Journal of Guangxi Agricultural and Biological Science
基金
中国热带农业科学院资助
华南热带农业大学基金
关键词
木薯
营养规律
平衡施肥
cassava
nutrition characteristic
balanced fertilization
