摘要
于2009年在辽宁省灌溉试验中心站设置了4种不同的节水灌溉控水指标进行试验,A为湿润灌溉,B和E分别为浅湿干Ⅰ和Ⅱ,对照CK为浅湿灌溉。结果表明：灌水下限指标对水稻株高的影响在插秧77后天呈显著水平,对分蘖的动态变化影响较小;土壤水吸力为250~400 kPa的灌水下限使水稻在拔节孕穗期和抽穗开花期遭受水分亏缺,造成了千粒重减轻、每穗粒数和实粒数降低;灌水上限设置过低则会增加灌水次数。在产量上A、B比CK分别减产17.7%和14.1%,E增产10.2%,综合分析A的灌溉水利用效率最高,B为较易推广的水稻节水灌溉模式。
Four different upper and lower irrigation limit experiments of rice were conducted in 2009 at Center Station of Irrigation Experiment in Liaoning,in which A was moisture condition,B was shallow wet dryⅠ,E was shallow wet dry Ⅱand CK was shallow wet,respectively.The results showed that the effects of lower limit on crop height was distinct after 77 days after transplanting,while a bit smaller influence on dynamic of tiller.The paddy enduring the water deficit in the period of jointing-booting and sprouting-boom resulted in total grain number and filled grain number per pancile significantly fell down and 1000-grain weight reduced considerably because the lower criteria of soil water potential was 250~400 kPa.Among the four treatments,the products of A and B reduced 17.7% and 14.1% than CK,while E increased 10.2%.;A has the maximum irrigation water productivity,B was the better one which may be the popular mode to popularize in irrigation district.
出处
《节水灌溉》
北大核心
2011年第4期15-17,20,共4页
Water Saving Irrigation
基金
辽宁省超级稻节水高产土壤水分能量调控标准20082122
关键词
水稻
控水指标
节水灌溉
rice
soil water control criteria
water-saving irrigation
