福建农业学报2013，Vol.28Issue(1)：33-36,4.
不同钾肥处理对秋甘薯性状产量的影响
Effect of Potassium Fertilizing on Yield of Fall Sweet-potato
摘要
Abstract
Relationship between applying K fertilizer and the yield of sweet potato was studied with variety of Xicheng Potato 007. The results showed that: K fertilizer improved the assimilative capacity of the sweet potato, and increased the dry matter accumulation while the plants partly inhibited in excessive growth of the stems and leaves. K fertilizer enhanced the plant capability in transporting assimilate to underground tuber, by which reducing the value of T/R and increasing economic production. Root dry rate and stem diameter were related with the species characteristics of sweet potato instead of K fertilizer amount. Reducing K fertilizer amount increased the portion in large- and medium-sized sweet potato, the length of the longest stem and the number of base branches. Comparing to control, the dry matter content was decreased by applying K fertilizer. The chlorophyll content of plants was higher in those treated with N and P fertilizer than with K fertilizer and without fertilization. For a low K level soil, the optimal amount of K fertilizer was 253. 05 - 262. 46 kg · hm-2 for producing high yield of dried sweet potato and starch, and was 316.05- 321.59 kg · hm-2 for producing high yield of fresh potato tuber yield. There was no difference observed between low K and high K levels on dry matter production, although K fertilizer improved fresh yield effectively.关键词
秋甘薯/钾肥/产量Key words
sweet potato/ potash fertilizer/ yield029i0[e\RFTGIOUYWQAERY6UQ5TYUIEDMN分类
农业科技引用本文复制引用
周全卢,杨洪康,李育明,何素兰,黄迎冬,王梅,张玉娟,刘莉莎..不同钾肥处理对秋甘薯性状产量的影响[J].福建农业学报,2013,28(1):33-36,4.基金项目
国家现代农业产业技术体系项目(nycytx-16-B-13,nycytx-16-c-16) （nycytx-16-B-13,nycytx-16-c-16）
农业部川渝薯类与大豆科学观测实验站 （）
