不同灌水定额下北疆地区滴灌打瓜耗水规律的研究

依据水量平衡原理,在阿勒泰地区通过大田小区试验与理论分析对打瓜耗水规律进行了研究。用以探究北疆地区打瓜开花坐果期和果实膨大前中期耗水规律,旨在为打瓜的灌溉制度提供理论指导。研究结果表明:耗水量与产量显著相关,且打瓜开花坐果前期耗水量中期后期果实膨大中期前期。但在土地贫瘠的情况下,作物耗水规律有可能出现"休养"情况。因此应在开花坐果期和果实膨大前中期在这两个时期应注意对作物进行水分与养分的补给,以增加作物产量,提高产品品质等。对于作物灌水需求程度,主要由该时期作物对水分敏感程度所决定。但各时期对水分敏感程度显著不同,因此需要对各生育期进行定量分析,以探究各生育期单独的最佳灌水定额。

Study on Water Consumption Law of Seeding-watermelon Under Different Drip Irrigation Quota in North Xinjiang

According to the principle of water balance ,the water consumption law of seeding-watermelon is studied in the Aletai area through the theoretical analysis and field test to explore the water consumption law in flowering and fruit bearing periods and medium term of fruit expanding periods in order to provide theoretical guidance for seeding-watermelon irrigation system .The research re‐sults show that :water consumption and yield were significantly correlated ;the order of seeding-watermelon water consumption in different stages from big to small is early stage ,medium stage ,later stage of flowering and fruit bearing periods ,medium stage ,and early stage of fruit expanding period .However ,under the barren land condition ,the crop water consumption pattern is likely to oc‐cur“resting” .Therefore ,in flowering and fruit bearing periods and the medium stage of fruit expanding period ,the water and nutri‐ent supply of crops should be paid attention in order to increase crop yields and improve product quality .Crop water demand is main‐ly determined by the water sensitivity extent of crop .In each period ,the water sensitivity extent is significantly different ,so the quantitative analysis is needed to be conducted for each growth period in order to explore the individual optimal irrigation quota of each growth stage .