草业学报2024，Vol.33Issue(12)：73-83,11.DOI:10.11686/cyxb2024037
施钾水平对北方风沙区油莎豆生长、块茎品质及产量的影响
Effects of potassium application level on the growth,tuber quality,and yield of Cyperus esculentus in the Northern wind-sand area
摘要
Abstract
In this study,the effects of the potassium(K)fertilizer application rate on the growth,physiology,biochemical indexes,tuber quality,and yield of Cyperus esculentus were determined,with an overall aim to provide theoretical support for the optimization of K fertilization for C.esculentus growing in the Northern Wind-Sand Area.A pot experiment with the C.esculentus cultivar Zhongyousha 1 was conducted in which K fertilizer was applied at four different levels:0(K0),0.15(K1),0.30(K2)and 0.45 g·kg-1(K3).The growth,physiology,biochemical indexes,tuber quality,and yield were analyzed.The results showed that,compared with the control(K0),all the treatments resulted in significantly increased values for plant height,tiller number,single leaf area,maximum root length,and root volume of C.esculentus.The highest activities of acetyl-CoA carboxylase and soluble starch synthas and the largest amount of starch and fat in tubers(229.03 mg·g-1 and 21.98%,respectively)were in the K1 treatment(K applied at 0.15 g·kg-1),but the values of these parameters were not significantly different from their respective values in the K2 treatment.The highest contents of unsaturated fatty acids and total fatty acids in the tubers(16.53 and 20.07 g·100 g-1,respectively)were in the K2 treatment.The highest total in the tubers sugar content(217.86 mg·g-1)was in the K3 treatment.The whole plant dry weight and yield of C.esculentus increased as the potassium application rate increased,and showed the highest values in the K3 treatment,but these values were not significantly different from those in the K2 treatment.Based on the quality,yield,and nutrient utilization rate of C.esculentus,we concluded that a K fertilizer application rate of 0.30 g·kg-1 can enhance its growth and development in the Northern Wind-Sand Area,improve the activities of enzymes and other indexes related to quality,and increase dry matter accumulation and tuber yield.关键词
油莎豆/钾肥/盆栽/产量/品质Key words
Cyperus esculentus/potassium fertilizer/potted/tuber yield/quality引用本文复制引用
曹秭琦,赵小庆,张向前,伍建辉,张帆,刘丹,路战远,任永峰..施钾水平对北方风沙区油莎豆生长、块茎品质及产量的影响[J].草业学报,2024,33(12):73-83,11.基金项目
国家重点研发计划(2019YFC0507602)资助. （2019YFC0507602）
