摘要
3年9个试验研究结果表明，施钾显著提高甘薯产量，主要表现在明显提高单个薯块重，施钾鲜薯产量平均提高26．8％，每千克K2O平均增收鲜薯44．8kg；在K2O用量75～300kg／hm2范围内鲜薯产量和薯藤产量随钾肥用量提高而提高，其中鲜薯产量提高的幅度大于薯藤；薯块水分和淀粉含量也有随钾肥用量提高而提高的趋势，在K2O为225kg／hm2时达到最高；施用氯化钾和硫酸钾均能提高甘薯产量和淀粉含量，甘薯产量是氯化钾处理高于硫酸钾处理，而淀粉含量则相反。在本试验条件下氯化钾对甘薯生长、产量和品质均无不利影响。
3 Years 9 field tests were carried out in east Hubei Tongshan County and west Hubei Zhicheng City.The main aim of the research was to study the effect of potassium (K) on sweet potato, suitable K rate and K form application. The results showed that the weight of single sweet potato root was increased by K application which led to yield increased by 26. 8%, and more 44. 8 kg sweet potato was harvested from every kg K2O in K2O application rate 75～300 kg/hm2, root and top (vine) yield were increased by K rate increasing. The water and starch content also increased following K rate increased, and both of them reached the highest at 225 kg K2O/hm2. SOp as well as MOP improved yield and starch content of sweet potato. FOr starch content, treatment SOP>MOP, however, for yield, MOP>SOP. In the research conditions, no negative effect on growth, yield and quality was found when MOP was applied on sweet potato.
出处
《湖北农业科学》
1998年第6期41-44,共4页
Hubei Agricultural Sciences
关键词
甘薯
钾肥
肥效
施用技术
Sweet potato (Ipomoea batatas L. )
potassium
effect
application technique
