论文部分内容阅读
通过田间试验,设置1350 m3·hm~(-2)、1650 m3·hm~(-2)、1950 m3·hm~(-2)、2250 m3·hm~(-2)4个灌水量和1个常规沟灌为对照,研究膜下滴灌对马铃薯的生长、产量和水分利用效率的影响。结果表明:膜下滴灌马铃薯生长发育快,株高、单株茎叶鲜重、单株结薯数、单株块茎鲜重高于常规沟灌,膜下滴灌较沟灌增产6 416.08 kg·hm~(-2),增产21.29%,水分利用率高79.5 kg·hm~(-2)·mm-1。膜下滴灌下不同灌水量马铃薯水分利用率随灌水量增加呈降低趋势,产量和耗水量随灌水量增加而增加,滴灌1950 m3·hm~(-2)的产量最高,为39 732.0 kg·hm~(-2),当灌水量增加到2250 m3·hm~(-2)时,产量较滴灌1950 m3·hm~(-2)处理的下降6 624.5 kg·hm~(-2),下降16.67%。从产量提高和节水方面考虑,在生育期间有效降雨量在70 mm左右时,灌水量在1650~1950 m3·hm~(-2)较为适宜。
Through field experiments, four irrigation levels of 1350 m3 · hm -2, 1650 m3 · hm -2, 1950 m3 · hm -2, 2250 m 3 · hm -2 and 1 A conventional furrow irrigation was used as a control to study the effects of drip irrigation under plastic film on potato growth, yield and water use efficiency. The results showed that the growth and development of potato under drip irrigation under plastic film were rapid, the height of plant, the fresh weight of stem and leaf per plant, the tuber number of tuber per plant and the fresh weight of tuber per plant were higher than those of conventional furrow irrigation. The drip irrigation under plastic film was 6 416.08 kg · hm ~ -2), yield 21.29%, and water use efficiency 79.5 kg · hm -2 (-2) · mm -1. The water use efficiency of potato under different drip irrigation under film drip irrigation decreased with the increase of irrigation volume, and the yield and water consumption increased with the increase of drip irrigation. The highest yield of drip irrigation at 1950 m3 · hm -2 was 39 732.0 kg · hm ~ (-2), when the irrigation volume was increased to 2250 m 3 · hm -2, the yield decreased by 6 624.5 kg · hm -2 and decreased by 16.67 compared with the treatment of 1950 m 3 · hm -2 %. Considering the increase of output and water saving, when the effective rainfall is about 70 mm during the growth period, the irrigation volume is more suitable for 1650 ~ 1950 m3 · hm -2.