]*>","")" /> Study on the regular pattern of water consumption of cotton under film mutch with drip irrigation in North Xinjiang

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Study on the regular pattern of water consumption of cotton under film mutch with drip irrigation in North Xinjiang

GUO Jin-qiang;WEI Chang-zhou;HOU Zhen-an;LI Jun-hua;WANG Juan   

  • Received:2005-04-25 Revised:2005-04-25 Online:2005-04-25 Published:2005-04-25

北疆棉花膜下滴灌耗水规律的研究

郭金强;危常州;侯振安;李俊华;王娟   

  1. 石河子大学新疆兵团绿洲生态农业重点实验室,新疆石河子 832003

摘要: 在3种灌溉量(2 850、3 900、4 950m3/hm2 )下研究了棉花膜下滴灌各生育期的耗水量与耗水强度.结果表明棉花的耗水量随着灌量的增加而增大,在北疆滴灌棉花适宜的灌溉量为3 900 m3/hm2,棉花最大蒸散量出现在花铃期,其中开花-吐絮期,耗水量240.96 mm,最大耗水时段为现蕾-吐絮,日均耗水量3.29~4.15 mm.棉花根系主要吸水层在0~60 cm土壤深度,高灌溉量棉花的吸水强度在0~40 cm大于低灌溉量,而在40~60 cm恰恰相反 .高灌溉量下棉花蕾期以前的土壤蒸发强度增大,干物质生产能力并没有相应增加,适当调节蕾期以前的灌溉量可以提高水分的利用效率.