| 高 龙,田富强,倪广恒,胡和平.膜下滴灌棉田土壤水盐分布特征及灌溉制度试验研究[J].水利学报,2010,41(12): |
| 膜下滴灌棉田土壤水盐分布特征及灌溉制度试验研究 |
| Experimental study on soil water-salt movement and irrigation schedulingfor cotton under mulched drip irrigation condition |
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| DOI： |
| 中文关键词: 干旱区 膜下滴灌 棉花 水盐分布 灌溉制度 |
| 英文关键词: arid area mulched drip irrigation cotton soil water and salt movement irrigation scheduling |
| 基金项目: |
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| 摘要点击次数: 3469 |
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| 中文摘要: |
| 在新疆库尔勒市西尼尔镇开展了膜下滴灌棉田土壤水盐分布特征及灌溉制度的试验研究，根据不同灌溉定额 （375、525和675mm） 及灌水间隔 （3.5、7和10.5d） 组合设置7个试验处理，通过对比分析研究了膜下滴灌条件下的土壤水、盐分布规律及其对棉花生长性状及最终产量的影响。试验结果表明： （1） 主根区土壤含水率自靠近滴灌带的宽行往外至膜间逐渐降低，土壤含盐率则呈相反的规律分布，灌溉期靠近滴灌带的主根区土壤处于脱盐状态，远离滴灌带的土壤处于积盐状态； （2） 相同灌水间隔下，灌溉定额越大，主根区含水率越高，主根区以下渗漏水分越多，棉花产量提高但灌溉水生产效率降低；相同灌水定额下，灌水间隔过大或过小均不利于棉花的生长； （3） 在试验区的砂性土壤条件下，675mm灌溉定额和7d灌水间隔的灌溉制度可获得最大籽棉产量为6816kg/hm2，375mm 灌溉定额和7d灌水间隔的灌溉制度可获得最高的灌溉水生产效率为1.33kg/m3。 |
| 英文摘要: |
| Field experiments were conducted to investigate the dynamic regimes of soil moisture and salt as
well as irrigation scheduling for cotton under mulched drip irrigation condition. Seven irrigation treatments with different total irrigation amounts （TIA） and irrigation intervals were designed. The results show that soil moisture decreases and soil salt increases as the distance from drip tape increases in horizontal direction. In irrigation periods，areas close to drip tape are in desalting process and areas away from drip tape are in salt cumulating process. The higher TIA leads to higher soil moisture while the irrigation water use efficiency will be lower. Either longer or shorter irrigation interval result in unfavor conditions for growth and yield of cotton. Under sandy soil condition，the maximum yield of cotton occurs when TIA is 675mm and irrigation interval is 7d，the maximum irrigation water used efficiency occurs when TIA is 375mm and irrigation interval is 7d. |
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