不同灌水量对甜菜生长及糖分积累影响的研究

Effect of Irrigation Water Amount to the Sugarbeet Growth and Sugar Accumulation

灌水是新疆干旱区甜菜生产的关键因素，土壤水分状况对甜菜生长和糖分积累有显著影响。研究表明：良好的供水有利于甜菜生长，增加块根产量，但含糖率会明显下降。叶丛快速生长期是甜菜生长的需水临界期，这一时期缺水将严重影响产量。控制供水，尤其是控制后期供水可提高块根含糖率。在本试验条件下，甜菜合理的灌溉为全生育期灌水6－7次，总灌水量300－350m3／亩，叶丛快速生长期充足灌水，每次亩灌水量60m3，后期灌水量逐渐减少，每次亩灌水量在30－45m3。

The irrigation is a important factor to sugarbeet growth in dry region of Xinjiang . The soil moisture affects the growth and sugar accumulation of beet. The study showed that adequate water promotes growth and increases yield, but the rate of sugar decreases greatly. Water is crucial for beet yield during the phyllome speed - growth stage. To control water supply, especially to control evening water supply can improve sugar ratio. Under this experiment condition, the rational scheme is that total irrigated capacity is 300 ~ 350(m3/667m2) devided 6 ~ 7 times in whole peried of beet growth .The enough water should be applied during phyllome speed - growth stage, and then the water supply was decreased gradually, which each irrigated capacity was controlled in range of 30 ~ 45(m3/667m2).