马铃薯钾素吸收积累与施用技术

基金项目:

福建省科技计划项目(2005N032);福建省科技计划重大专项(2008NZ0201)

Potassium absorption and fertilization of potatoes

1.
College of Crop Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China;
2.
Agricultural Technology Extension General Station, Fujian Province Department of Agriculture, Fuzhou, Fujian 350001, China;
3.
Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, Fujian 350019, China;
4.
Agricultural Technology Extension Station of Zhangzhou, Zhangzhou, Fujian 363000, China

摘要: 为探索马铃薯钾素吸收积累规律和施用技术,在闽东南冬种马铃薯区设置施K量试验.结果表明,马铃薯全株及块茎的K素积累呈Logistic曲线动态,吸K盛期在现蕾前14d至成熟前15d,后期块茎新增K素主要来自叶片的转移.马铃薯产量与施K量呈抛物线型相关,在供试条件下,经济施K量为201.6kghm-2,预期产量为37424kghm-2,平均每生产1000kg块茎需施K5.4kg.
- 马铃薯 /
- 钾素吸收积累 /
- 氯离子毒害 /
- 施肥技术
Abstract: To understand the potassium(K)absorption and fertilization of potatoes,an experiment was conducted in Southeast Fujian using the winter potatoes.The results showed that the K accumulation in the entire plant and tuber of the potatoes was a Logistic dynamic curve.The vigorous stage of the absorption occurred during the 14d before squaring to the 15d prior to maturation.In the late stage,the tuber acquired K primarily from the leaves.The potato yield correlated to the amount of K application parabolically.Under the test conditions,the economic K application was determined to be 201.6 kghm-2 with an expected yield of 37424 kghm-2.On the average,to produce 1 000 kg tubers 5.4 kg of K fertilization were required.
- potato /
- K absorption accumulation /
- Cl-toxicity /
- application technique

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