含控释钾腐植酸复合肥对甘薯产量及品质的影响

Effects of Humic Acid Compound Fertilizer Containing Controlled Release Potassium on the Yield and Quality of Sweet Potato

为探明施用含控释钾腐植酸复合肥对甘薯产量及品质的影响,采用田间试验法,选取“济薯25”“济薯26”“龙薯9”“西瓜红”“烟薯25”共计5个品种,在不同土壤肥力条件下布置15个试验点,每个点分别设置普通复合肥(CK)和含控释钾腐植酸复合肥(KK)共2个处理,研究施用含控释钾腐植酸复合肥对甘薯膨大中期土壤速效钾、甘薯冠根比(T/R值)及收获期单株结薯数、商品薯率、产量、淀粉含量、可溶性糖含量的影响。结果表明:施用含控释钾腐植酸复合肥可提高甘薯膨大期土壤速效钾养分9.31%~49.08%,降低甘薯T/R值8.33%~10.84%,增大甘薯单株结薯数0~12.82%,增加商品薯率1.43%~21.09%,不同品种甘薯产量显著提高13.57%~43.60%,淀粉含量提高6.30%~13.50%,可溶性糖含量提高6.18%~16.02%,净利润率提高25.52%~156.12%。

In order to know the effects of humic acid compound fertilizer containing controlled release potassium on the yield and quality of sweet potato,15 test sites with five sweet potato varieties(“Jishu 25”“Jishu 26”“Longshu 9”“Xiguahong”“Yanshu 25”)and two treatments at each test site as ordinary compound fertilizer(CK)and humic acid compound fertilizer containing controlled release potassium(KK)were set.The effects of humic acid compound fertilizer on soil available potassium content,the T/R of sweet potato in the middle stage of sweet potato swelling,the tuber number of per plant,commercial potato rate,yield,starch and soluble sugar content during harvest were studied.The result showed that humic acid compound fertilizer cloud improve the soil available potassium by 9.31%~49.08%,reduce T/R by 8.33%~10.84%,increase the tuber number of per plant by 0 to 12.82%,the rate of commercial potato rate by 1.43%~21.09%,the yield by 13.57%~43.60%,the starch content by 6.30%~13.50%,the soluble sugar content by 6.18%~16.02%,and increase the net profit margin by 25.52%~156.12%on the different sweet potato varieties respectively.