摘要
在日光温室内研究了常规灌溉条件下,嫁接和3种施氮水平(0、110和331kg.hm-2)对日光温室黄瓜耗水量和水分利用效率的影响.结果表明:在嫁接和追施氮肥331kg.hm-2时,黄瓜耗水量最高,冬春茬和秋冬茬分别为3350和2181m3.hm-2,水分利用效率也最高,两茬口分别为27.2和36.9kg.m-3.在施氮量相同的情况下,嫁接黄瓜的耗水量比自根黄瓜提高3～6,经济产量和水分利用效率则分别提高28和20.9;随着施氮量的增加,嫁接黄瓜耗水量和水分利用效率均显著增加,自根黄瓜耗水量也随施氮量的增加而增加,但水分利用效率却在施氮110kg.hm-2时最高.因此,嫁接栽培可显著提高黄瓜耗水量及水分利用效率,且随着施氮量的增加而显著增加;增施氮肥也可显著提高自根黄瓜的耗水量,但氮肥增施过多则将降低自根黄瓜的水分利用效率.
An experiment was conducted in solar greenhouse to study the ettects of gratt and different nitrogen （N） supply levels （0, 110, and 331 kg · hm^-2） on the water consumption and water use efficiency （WUE） of cucumber （ Cucumis sativus L. ） under traditional irrigation. The results showed that when topdressing 331 kg N · hm^-2, the water consumption of highest, being 3 350 m3 · hm^-2 and 2 181 m3 · hm^-2 in winter-spring grafted cucumber was the and autumn-winter cropping, so did the WUE, being 27.2 kg · m^-3 and 36. 9 kg · m^-3, respectively. Comparing with those of self-rooted cucumber, the water consumption, economic yield, and WUE of grafted cucumber under the same N topdressing levels were increased by 3%-6%, 28%, and 20. 9%, respectively, and the water consumption and WUE of grafted cucumber were increased with increasing N supply level. The water consumption of self-rooted cucumber also increased with increasing N supply level, but its WUE was the highest when the N supply was 110 kg · hm^-2. It was indicated that graft could markedly promote the water consumption and WUE of cucumber, and the effect was more markedly with increasing N supply level. To increase N supply could also markedly promote the water consumption of serf-rooted cucumber, but the WUE would be lower when excessive N was supplied.
出处
《应用生态学报》
CAS
CSCD
北大核心
2008年第12期2656-2660,共5页
Chinese Journal of Applied Ecology
基金
科技支撑计划项目(2006BAD07B04、2006BAD01A07)
北京市都市农业学科群建设资助项目(Xk100190553)
关键词
嫁接
施氮水平
黄瓜
耗水量
水分利用效率
graft
nitrogen supplying level
cucumber
water consumption
water use efficiency.
