【摘 要】
：
该文以棉花为供试材料,研究了2种不同膜下滴灌(分根交替膜下滴灌和全根区均匀膜下滴灌)在3种不同灌水量(3750、4500、5250 m3/hm2)条件下南疆膜下滴灌棉花的耗水特性、生长状
【机 构】
：
中科院新疆生态与地理研究所,新疆农业大学水利与土木工程学院,河海大学现代农业水土工程学院
论文部分内容阅读
该文以棉花为供试材料,研究了2种不同膜下滴灌(分根交替膜下滴灌和全根区均匀膜下滴灌)在3种不同灌水量(3750、4500、5250 m3/hm2)条件下南疆膜下滴灌棉花的耗水特性、生长状况(株高、根长等)以及水分利用效率.结果表明,分根交替膜下滴灌在中等灌水量(4500 m3/hm2)下干旱区棉田土壤水分的垂向最大湿润深度达50 cm多,土壤水分水平最大湿润半径为40 cm左右,其中覆膜中间点土壤含水率最大,其次是覆膜边缘,而在棵间裸地中间点土壤含水率最小.土壤平均含水率在棉花全生育期内有着上升的趋势,在2种滴灌模式下,棉花株高和根长随灌水量的增加而增高.当灌水量一定时,不同灌水模式对株高和根长的影响不明显,棉花株高和根长在分根交替膜下滴灌模式下其生长量受灌水量的影响要大于全根均匀膜下滴灌模式.相比全根均匀膜下滴灌,分根交替膜下滴灌抑制了棉花蒸腾速率,即分根交替膜下滴灌通过减少棵间蒸发和作物蒸腾耗水来提高了棉花的水分利用效率,这对实现干旱区滴灌棉田节水高产高效具有重要意义.
其他文献
Background Untreated human cytomegalovirus (CMV) disease (CMVD) is an identified risk factor for reduced rates of patient (and graft) survival,death or retransp
With the use of a seed washing technique, more than 4000 Gram negative bacteria were isolated by two improved isolation methods from 446 batches of 1 kg rice se
In allusion to the difficulty of integrating data with different models in integrating spatial information,the characteristics of raster structure, vector struc
Barely visible impact damage (BVID) is developed when polymer matrix composites are subjected to impact loading. The damage has an adverse effect on structural
Understanding the growth and physiological responses of rice to upland conditions would be helpful for designing treatments to improve the tolerance of rice und
To reveal the low growth rate of Acidithiobacillus ferrooxidans, a stochastic growth model was proposed to analyze growth curves of these bacteria in a batch cu
Background Anisodamine is widely used in therapy for treating acute glomerulonephritis and diabetic nephropathy because it can improve renal microcirculation.We
Background Understanding the characteristics of Chinese dialysis patients and the current practice trends is the first step to evaluate the association between
Background Juvenile onset recurrent respiratory papillomatosis (JORRP) is a relatively rare disease.It affects the larynx in most cases.Because reports on JORRP
分析信息时代科技资料管理人员应具备的素质和能力,并对科技资料管理人员的素质培养进行了探讨.