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.