冀北地区膜下滴灌条件下白菜需水量研究

为了提高冀北地区白菜生产上灌溉水的利用效率,在膜下滴灌条件下,以常规滴灌(白菜全生育期滴灌8次)为对照(CK),在白菜主要生育期设置不同的灌水次数,试验设白菜全生育期内灌水4、5、6和7次4个节水灌溉处理,灌水量均为240 m3/(hm2·次),研究了不同节水灌溉条件下白菜地上地下生长质量、产量和耗水量的变化,以筛选与CK地上地下生长质量和产量均基本相当条件下的最省水灌溉方式。结果表明:白菜全生育期滴灌5次(苗期1次,团棵期1次,结球期3次)效果较好。该处理的灌水定额仅为CK的62.5%,但白菜根鲜重、叶球紧实度和产量与CK差异不大,且耗水量明显减少。

Study on the Water Demand of Cabbage with Drip Irrigation under Mulch in Northern Hebei Region

In order to improve the irrigation water use efficiency of cabbage production in northern Hebei, under the condition of drip irrigation under film, the experiment set up 4 irrigation treatments with 4,5,6 and 7 times in the whole growing period of cabbage,and every time the irrigation amount was 240 m3/hm2, with the conventional drip irrigation (8 times of drip irrigation in the whole growth period) as control,then the changes of the growth rate,yield and water consumption of cabbage under different water saving irrigation conditions were studied to screen the best water-saving irrigation methods. The re-sults showed that the effect of drip irrigation 5 times in the whole growing period of cabbage was better, the irrigation amount was only 62.5% of CK, and there were no significant differences on root fresh weight,leaf ball compaction and production with that of CK.