滴灌马铃薯生长及产量的影响

通过对不同灌水量及不同灌水间隔时间的马铃薯生长状况进行大田滴灌试验,研究马铃薯适宜的灌水定额及灌水周期,以求达到节水、增产的目的。试验结果表明:马铃薯滴灌时,灌水量越大,灌水周期越短,株高越高;茎粗开始衰减的时间比株高要早十几天,且衰减幅度比株高要大。灌水周期最短的处理茎粗却并不是最大,在180 m3/hm2的灌水定额下,灌水周期为5天的处理茎粗值最大。在相同的灌水量下,灌水间隔时间越短的处理马铃薯淀粉含量越高。灌水定额越小,灌水周期对产量的影响就越大;而当灌水定额一定时,灌水周期越短,产量越高;灌水定额为90 m3/hm2,灌水周期为3天的处理产量最高,为28 260 kg/hm2,比7天1灌的处理每公顷产量高出达10 350 kg。

Effect of different treatment of drip irrigation on growth of potato

In order to find out the proper water irrigation and proper irrigation time of potatoes,we carried out a big field experiment.The experiment is mainly to observe the development of potato in different water irrigation and irrigation time.It showed that,the more irrigation water and shorter irrigation cycle,the higher the potato plants were;The time for the stalk thick beginning to attenuate is earlier than the height to attenuate for more than 10 days,and the attenuate range was larger than the plant height.The stalk of potatoes with the shortest irrigation period was not the thickest.When it was irrigated with 180 m3/hm2,the stalk of potatoes was the thickest as the period was 5 days.The smaller the water amount was,the irrigation period took more effect on the yield.But in the same water amount,the shorter the period was,the higher the yields were.The maximum yield was 28 260 kg/hm2,which came from the pattern in which irrigation was made every 3 days with an amount water of 90 m3/hm2 for each time during the whole stage.It was 10 350 kg higher than that of irrigating every 7 days with the same amount of irrigation water.