Results 1 to 10 of about 742 (133)
Shuitu Baochi Xuebao, 2005 在南疆气候条件下．研究了膜下滴灌盐分动态变化及平衡．结果表明：在南疆，棉花苗期时，土壤盐分开始分区，盐分在膜间0～40cm强烈聚集，膜下盐分变化不大，而且在覆膜的作用下发生侧向运移，移向膜间，加剧了膜间的盐分累积；棉花生育期结束后．土壤0～60cm盐分都有增加．在膜间0～20cm盐分强烈累积；灌水量为345mm的处理盐分增加明显，积盐率高达．94．5％，其增加的盐分主要来自下边界土壤水分上行所带来的盐分，占盐分增加量的57％．而灌水量505mm处理增加的盐分主要来自灌溉水所携带的盐分，占81 ...
刘新永 田长彦
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Shuitu Baochi Xuebao, 2007 通过分层土柱挖掘法，研究膜下滴灌条件下不同滴灌量棉花（Gossypium hirsutum L．）根系的分布特征。结果表明：直径〉1mm的粗根只分布在40cm以上的土层；随着土层深度增加，棉花根系生物量逐渐减少；但随着滴灌量减少，土壤深层根系生物量有增加趋势。不同处理的根系生物量的分布与土层深度呈显著的负指数关系，棉花细根生物量、根长、根表面积在土壤中垂直分布都呈“单峰型”曲线变化规律；但随着滴灌量的减少，棉花根系消弱系数β呈增加趋势。
方怡向 +4 more
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Soil Salinization Characteristics of Different Land Use Types in a Typical Oasis Irrigation Area of Lower Tarim River [PDF]
, 2023 [Objective] The soil salinization characteristics under different land use types in extremely arid regions were analyzed in order to provide support for the sustainable efficient utilization of regional land resources.
Baiyun Gang +6 more
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Shuitu Baochi Xuebao, 2017 土壤水热状况是影响干旱区作物产量的主要因素，围绕膜下滴灌土壤水热运移情况，以河套灌区玉米为研究对象，开展了2年的田间试验，研究了膜下滴灌条件下不同覆膜耕作方式对土壤水热运移规律的影响。试验设垄作全膜（LQ）、垄作半膜（LB）、平作全膜（PQ）和平作半膜（PB） 4个处理，采用烘干法测定0—120 cm土壤含水量，ECH2O-5TE探头测定0—120 cm土壤温度。试验结果表明：在苗期，0—20 cm土层LQ土壤含水率较LB、PQ和PB分别提高了14.4%，23.8%和26.9%；拔节期，0—40 ...
齐智娟 +4 more
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Ecological Service Function Evaluation of Urban Greening Shrubs in Guanzhong Region, Shaanxi Province [PDF]
, 2023 [Objective] The landscapes and ecological service functions were comprehensively evaluated in order to provide scientific guidance for the selection of urban greening shrub species. [Methods] Several indexes including landscape service functions (such as
Gai Shuaizi +5 more
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Effects of Winter Irrigation on Soil Water-heat-salt Migration and Crop Growth During Freezing-Thawing Period in Qingtongxia Irrigation District of Ningxia [PDF]
, 2023 [Objective] The effects of winter irrigation on soil water-heat-salt migration and crop growth during the freezing-thawing period were analyzed in order to provide a scientific basis for controlling soil salinization, and to ensure food security ...
Han Yuping +4 more
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Physiological responses of three cultivar seedlings of Bougainvillea under drought stress [PDF]
, 2017 该研究对勤花三角梅(Bougainvillea buttiana Miss Manila')、樱花三角梅(B.glabra Imperial; Delight')和金心鸳鸯三角梅(B.peruviana; Thimma')三个三角梅品种的幼苗进行人工干旱胁迫,分析了干旱胁迫对三角梅品种的外观形态和生理生化水平的影响,探讨了不同品种三角梅对干旱胁迫的; 适应能力。结果表明:随着干旱时间的延长,三角梅品种的叶片出现下垂、皱缩、变黄、脱落,最后植株死亡;过氧化物酶POD活性先升高后降低,而超氧化物歧 ...
丁印龙 +4 more
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覆膜方式和滴灌带布设对春玉米根区土壤水氮均匀度及根冠生长及产量的影响
Shuitu Baochi Xuebao, 2023 为探求不同覆膜方式及滴灌带布设对作物产量及收获系数的影响,设置不同滴灌带间距(A1:1 m;A2:0.5 m)与覆膜方式(M1:全覆盖;M2:半膜覆盖),通过2年田间试验研究其对根区土壤水氮分布均匀度(CUw, CUN)及春玉米根冠生长及产量的影响。结果表明:膜下滴灌条件下,根区土壤含水率与其分布均匀度具有一致性;高频滴灌施肥虽提高根区土壤NO3-含量却降低其分布均匀度,表现出不一致性。提高土壤水、氮分布均匀度未显著影响作物根长密度,但增加地上部叶面积,从而降低作物根冠面积比。相比滴灌带布设 ...
周立峰, 蒋有源, 冯浩, 杨荣
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Shuitu Baochi Xuebao, 2021 研究膜下滴灌条件下，不同水肥组合对西兰花光合、产量、水肥利用效率及品质的影响，并建立西兰花产量—品质与水肥因素的回归模型及主成分综合评价体系，寻求西兰花最优的灌水量和施肥量组合，为西兰花高效节水灌溉提质增效提供技术依据。以西兰花为试验作物，采取膜下滴灌的灌溉方式，采用二因素三水平随机区组试验设计。灌水量设置3个水平，分别为1 740，2 175，2 610 m3/hm2，施肥量设置3个水平，分别为1 200，1 500，1 800 kg/hm2，共9个处理。结果表明：在生育期降水量为20.8 mm ...
陈华斌, 田军仓, 李王成, 沈晖
doaj
Effects of PBAT on Soil Water and Salt in Maize Root Zone and Maize Yield in Saline-alkali Land [PDF]
[Objective] In order to reduce soil pollution caused by plastic film, the application effect of using PBAT fully biodegradable plastic film instead of ordinary PE plastic film combined with drip irrigation to grow maize in mild secondary salinized soil ...
HOU Jiana +6 more
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