Effects of different irrigation quantity on the growth and photosynthesis of lettuce 不同灌水量对生菜生长和光合作用的影响
Effects of irrigation quota and period on yield and water use efficiency of wheat 灌水量和灌水时期对小麦产量和水分利用率的影响
Results also showed that seed cotton yield under adi had no significant difference with 30 . 8 % water being saved 同等产量水平下与常规滴灌相比,交替滴灌可节省30 . 8 %的灌水量。
( 2 ) in case of specified volume of applied water , the shape of wetted soil volume is influenced by discharge rate ( 2 )在灌水量一定的情况下,滴头流量对湿润体的形状有明显的影响。
Vegetable nitrogen contention and nitrogen leaching in soil were strongly affected by water and nitrogen supply in the experiments 土壤中0 100cm硝态氮积累量随着施氮量的增加而增加,随着灌水量的增加而降低。
With the low irrigation water , the content of no3 - - n was lower in the upper layer of soil , and higher in deeper soil layers 土壤硝态氮的变化趋势为,灌溉施肥灌水量低时,上低下高;增加灌水量降低了土壤中硝态氮含量。
The nh4 + - n accumulated in the upper layer of soil when the irrigation water was low ; and at the high irrigation rate , this accumulation was decreased 灌水量低时,滴灌施肥铵态氮在土壤上层明显累积;灌水量增加后,这种累积作用减弱。
Water and fertilizer influenced the ecophysiological characteristics of achnatherum splendens leaf markedly which raised with the increase of water and fertilizer . 7 水分和肥料对友友草光合生理生态特性的影响差异显著,光合速率随灌水量、施肥量的增加而增加。
Based on the field experiments of nitrogen fertilizer and irrigation applied to winter wheat , the effects of quantity on its dynamic distribution of soil no3 ( superscript - ) - n were studied 摘要通过田间试验,研究了不同氮肥用量和灌水量情况下土壤中硝态氮的动态分布。
This article is focused on the effect of field measures on the price and quality of drip irrigation system and exactly determining the quantity of irrigation water 本文着重研究的滴灌系统的田间工程对滴灌系统的造价和灌水均匀度的影响,以及精确测定灌水量的简便途径。