摘要
为了确定陇中地区马铃薯生产中氯化钾的合理用量，于2010年在甘肃兰州和定西两地进行了不同氯化钾施用量试验，测定了马铃薯单株块茎数、块茎重、大中薯率、烂薯率和薯块产量，分析了不同用量下马铃薯品质。结果表明，在施N 120 kg/hm^2和P2O560 kg/hm^2的基础上，K2O用量在0～84 kg/hm^2的范围内，随着钾肥施入量的增加，单株块茎数、块茎重、大中薯率和薯块产量以及马铃薯干物质、粗淀粉和还原糖含量不断提高，而烂薯率明显减小，维生素C含量不断下降；且在钾肥施入量为84 kg/hm^2时，单株块茎数、块茎重、大中薯率和薯块产量以及马铃薯干物质、粗淀粉含量最高，而烂薯率最低。因此，甘肃马铃薯主产区马铃薯生产过程中，在施纯N 120 kg/hm^2和P2O560 kg/hm^2条件下，氯化钾适宜用量为K2O 36～84 kg/hm^2。
Field experiments of different application rates of KCl were conducted in 2010 at Lanzhou and Dingxi Cities to determine the reasonable application rate of KCl in the main area of potato cultivation in Gansu Province. Tuber number per plant, tuber yield per plant, marketable tuber percentage, rotted tuber percentage, tuber yield and quality were determined under different application rates. The results indicated that increasing potassium application rate improved tuber number per plant, tuber yield per plant, marketable tuber percentage, tuber yield, dry matter content, crude starch content and reducing sugar content based on N 120 kg/ha, P2O5 60 kg/ha and K2O 0-84 kg/ha, but rotted tuber percentage and vitamin C content decreased. The tuber number per plant, tuber yield per plant, marketable tuber percentage, tuber yield, dry matter content and crude starch content were the highest, and rotted tuber percentage was the lowest with the application of K2O 84 kg/ha. So it was proved that reasonable application of KCl could be 36-84 kg/ha based on N 120 kg/ha and P2O5 60 kg/ha in the main areas of potato cultivation in Gansu Province.
出处
《中国马铃薯》
2015年第5期278-282,共5页
Chinese Potato Journal
基金
国家科技部农业科技成果转化资金项目(2008GB2G100325)
甘肃省科技厅农业科技成果转化资金项目(0704XCNA011)
关键词
马铃薯
氯化钾
产量
品质
potato
potassium chloride
yield
quality
