摘要
研究了不同钾肥用量对地膜覆盖小南瓜光合特性和产量的影响。结果表明:施用钾肥能够提高小南瓜叶片的光合速率,在一定程度上可以降低小南瓜叶片的蒸腾速率。也能使茎秆粗壮,有效地促进单位叶面积内干物质的积累,明显提高小南瓜的产量。在本试验范围内,小南瓜的田间适宜施钾量(K2O)为121.5 kg/hm2。
This paper studied the effect of potassium nutrition on yield and photosynthetic characteristic of small cushaw under plastic film mulch cover. The result showed that photosynthetic rate in leaves of small cushaw increased and transpiration rate decreased as applying potassium fertilizer. The stem wide and SLA and yield of small cushaw were significantly increased, too.The optimum fertilizer potassium level was 121.5 kg/hm^2 in this study.
出处
《华北农学报》
CSCD
北大核心
2007年第5期86-89,共4页
Acta Agriculturae Boreali-Sinica
基金
国家重点基础研究项目(G2000018606)
国家防沙治沙应急计划项目(FS2000-03)
河北省"十五"重点科技攻关项目(03220134D)
关键词
钾营养
小南瓜
地膜覆盖
产量
光合特性
Potassium nutrition
Small cushaw
Plastic film mulch cover
Yield
Photosynthetic characteristic
