灌水频率对膜下滴灌土壤水盐分布和棉花生长的影响研究

新疆是我国最严重干旱区之一,也是我国最大的优质棉花生产和出口基地,棉花种植面积达101.2万hm2。目前仅新疆兵团已推广棉花膜下滴灌面积25万多hm2,占我国微灌面积的2/3以上。棉花膜下滴灌在不同的土壤含盐量条件下,灌水频率对土壤水盐运动和棉花生长的影响。试验结果表明:在灌水量相同的情况下,高含盐量土壤花铃期高频灌溉与低频灌溉相比,棉花增产28%,而对于低盐土,灌溉频率对产量没有显著影响。

Study on Effects of Irrigation Frequency on Moisture and Salt Regime and Growth of Cotton Under Mulch-film Drip Irrigation

Xinjiang is the most arid area, and it is also the largest produce and export base of high quality cotton in China. The cultivated area of cotton is 1,012,000 hm~2. At present, the area of mulch-film drip irrigation of cotton is popularized to 250,000 hm~2 only in Xinjiang Bingtuan, occupy 2/3 area of micro irrigation in China. This paper mainly researches on the effects of irrigation frequency on soil moisture and salt regime and growth of cotton in different condition of soil salinity under mulch-film drip irrigation. The result shows that with the same amount of irrigation, higher frequency irrigation effectively elevates yield by 28%, while the frequency of irrigation will not significantly affect the yield of cotton in soil containing lower salinity level.