[Effects of graft and nitrogen supply level on water consumption and water use efficiency of solar greenhouse cucumber under traditional irrigation].
An experiment was conducted in solar greenhouse to study the effects of graft and different nitrogen (N) supply levels (0, 110, and 331 kg k x 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 x hm(-2), the water consumption of grafted cucumber was the highest, being 3350 m3 x hm(-2) and 2181 m3 x hm(-2) in winter-spring and autumn-winter cropping, so did the WUE, being 27.2 kg x m(-3) and 36.9 kg x 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 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 self-rooted cucumber, but the WUE would be lower when excessive N was supplied.
Chen
Xiao-yan
XY
College of Agronomy and Biotechnology, China Agricultural University, Beijing 100094, China. chen_xy1089@126.com
Wang
Lu
L
Wang
Yong-quan
YQ
Sun
Huan-ming
HM
Ren
Hua-zhong
HZ
D000383:Agriculture / Q000379:methods*; D018553:Cucumis sativus / Q000254:growth & development* / Q000378:metabolism*; D004780:Environment, Controlled; D005308:Fertilizers; D009584:Nitrogen / Q000494:pharmacology*; D018526:Plant Transpiration; D014867:Water / Q000378:metabolism*
D005308:Fertilizers; D014867:Water; D009584:Nitrogen