论文部分内容阅读
试验研究表明：（1）海伦地区甜菜耗水高峰为块根膨大期和叶丛繁茂期，日均耗水量分别为4．43毫米和4．33毫米。（2）在甜菜生育前期，水分来源以土壤供水为主，耗水则以生态耗水（无效耗水）为主，中、后期水份供给以自然降水为主，而耗水则以生理耗水（有效耗水）为主，生态耗水为辅。（3）经济产量与水分生产效率呈正相关（r＝0．9816）、与耗水系数呈负相关（r＝0．9859）。（4）轮作年限与耗水系数呈负相关（r＝0．7887．），与水分生产效率呈正相关（r＝0．8217．），其中6年轮作的甜菜水分利用率最优，其次是4年轮作。
The experimental research shows that: (1) The water consumption of sugar beet in Helen area is the bulking period of tuberous roots and leafy period, and the daily average water consumption is 4.43mm and 4.33mm respectively. (2) In the early stage of sugarbeet growth, the main source of water was soil water supply, while the water consumption was mainly ecological water consumption (ineffective water consumption). The water supply was dominated by natural precipitation in the early and late stages, Water (effective water consumption), supplemented by ecological water consumption. (3) There is a positive correlation between economic yield and water production efficiency (r = 0.9816) and a negative correlation with water consumption coefficient (r = 0.9859). (4) Rotational life was negatively correlated with water consumption coefficient (r = 0.7887), and was positively correlated with water production efficiency (r = 0.8217), of which the water use efficiency of beet 4 years rotation.