自然条件下压砂年限对旱区压砂瓜生理特性及产量的影响

Effects of Sand-mulching Years on Physiological Characteristics and Yield of Watermelon in Sand-mulching Field in Arid Regions Under Natural Conditions

以"金城5号"西瓜嫁接苗为试材,采用单因素对比试验设计方法,研究了自然条件下压砂年限对旱区压砂瓜生理特性及产量的影响,以期为干旱盐碱地地区压砂瓜可持续开发提供参考依据。结果表明:在全生育期内,除土壤有机质变化规律为凸双峰模式,其余养分变化相似,呈凸单峰模式,其高峰期和低峰期有所不同;压砂地的土壤养分(速效磷、速效钾、碱解氮和有机质)含量均随着压砂年限的增加而降低,而土壤全盐含量则相反;在全生育期,压砂瓜主蔓长、叶片数、叶面积和叶面积指数均呈上升趋势且随着压砂年限的延长而逐渐减小;在试验条件下,随着压砂年限的延长产量随之降低。

‘Jincheng 5 ’watermelon was used as test material, using single-factor comparison experiment, the effects of sand-mulching years on physiological characteristics and yield of watermelon in sand-mulching field in arid regions under natural conditions were studied, in order to provide theoretical basis for sustainable development of watermelon in sand-mulching field. The results showed that during the growth period, the change curve of soil organic matter showed a double peak curve, others showed a single peak curve, but the high peak and low peak of every treatment was different. With the sand-mulching years increasing, the soil nutrient content （available P, available K, available N and organic matter） decreased, the total salinity showed the contrary. During the growth period, main stem length, the number of leaves, leaf area and leaf area index were on the rise, and decreased with the sand-mulching years decreasing. Under the experimental conditions, the yield of watermelon decreased when the sand-mulching years extended.