Results 11 to 20 of about 1,766 (143)
Effects of Plant Density Regulation on Soil Physical Properties and Plant Diversity of Plantations in Yellow River Flood Plain of Northern Shandong Province [PDF]
, 2022 [Objective] The effects of plant density regulation on soil physical properties and plant diversity of different plant stands in the Yellow River flood plain were analyzed in order to provide a theoretical basis for optimizing stand growth, improving ...
Chen Ping +3 more
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论住宅合作社制度的重新激活——以破解合作住宅“拿地难”为切入点 [PDF]
, 2018 住宅合作社是合作社的一种形态,是有住房需求的中低收入家庭的人合组织,其开发的合作住宅是政府主导供给的社会保障性住房之外的必要补充,具有独特功能和价值。然而由于住宅合作社的发展存在相关立法不周延、与地方政府目标乖离、面临其他用地主体竞争以及缺乏金融支持等障碍,合作住宅越来越难以取得土地,住宅合作社运动陷入低谷、几近停滞。重新认识合作住宅在住宅体系中的定位,完善住宅合作社立法,修正地方政府政绩导向,平衡住宅合作社与其他用地主体关系,加强对合作住宅开发的金融支持,是解决住宅合作社拿地难问题 ...
郭泽喆, 黄健雄
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Natural Vegetation Succession Characteristics and Influencing Factors for Reclamation Area of Tianjin City [PDF]
, 2022 [Objective] The natural vegetation succession characteristics and influencing factors for a reclamation area in Tianjin City were studied in order to provide a scientific basis for ecological restoration and reconstruction of the reclamation area ...
Gao Yue, Li Hongyuan, Luo Li
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, 2015 建立HPLC 法测定菊芋叶中绿原酸含量的方法,对菊芋植株中不同部位绿原酸的分布规律,以及不同品系、盐度、采摘时间等因素对菊芋叶中绿原酸含量的影响情况进行研究。方法:色谱柱为Hypersil BDS C-18(4.6×250 mm,5 μm),流速为1 mL min-1 ,检测波长为327 nm,进样量为10 μL,柱温为30℃,流动相为0.1%三氟乙酸水(A)-乙腈(B)。结果:菊芋叶中绿原酸的含量(3.40%)显著高于其他部位绿原酸的含量;10 ...
夏传海 +1 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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Review of techniques and case studies for saline-alkali land amelioration in the coastal regions of China [PDF]
Soil salinization is one of the major challenges in agricultural production and ecological development. With the rapid development of China’s coastal areas, land resources are becoming increasingly scarce, creating an urgent need for the improvement and ...
Hang LYU +5 more
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Shuitu Baochi Xuebao, 2003 选择松嫩平原西部盐碱化程度最高的大安市叉干镇明乐村,研究碱斑地的蒸散过程、土壤水分入渗过程,以及盐分运移和水盐平衡规律,进一步探讨该地区盐渍荒漠化的形成机理。结果表明:碱斑地没有植被覆盖,蒸散过程以土壤蒸发为主,水分运动带动盐分大量向土表积累;碱斑地土壤水分入渗率低,下行盐分远远小于上行盐分。土壤表层盐分累积的结果,使得该地区的草地景观退化,碱斑地面积增加,导致盐渍荒漠化程度加剧。
吴乐知 李取生
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Mechanisms of Cadmium Tolerance and Detoxification in Sesuvium portulacastrum L. [PDF]
, 2016 近年来由于电镀业、化工业、采矿业蓬勃发展导致大量镉进入水体、大气、土壤环境中，造成严重的镉污染问题，严重威胁生物生命安全。目前镉污染问题已经成为当今世界共同关注的环境问题之一，植物修复法作为一种“绿色”的污染治理手段，由于具有低成本、高净化效率等优点，成为国际上的热点研究领域。目前，植物修复方法的应用越来越广泛，但仍存在很大的局限性，大部分超累积植物生物量少，修复效果不理想，且只能适用于低盐土壤或淡水水域修复，而能够用于盐碱地、湿地及海水水域等盐度较高区域重金属修复的相关植物较少 ...
陈珍芳
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Shuitu Baochi Xuebao, 2008 对松嫩平原西部退化盐碱草地土壤过氧化氢酶、过氧化物酶、多酚氧化酶、蛋白酶、转化酶及碱性磷酸酶活性的季节动态进行研究,结果表明:土壤过氧化物酶、蛋白酶和转化酶活性在碱斑及不同退化程度盐碱草地中的季节变化趋势不同,而过氧化氢酶、多酚氧化酶和碱性磷酸酶活性的季节变化趋势基本一致,其峰值出现在8月或9月;在不同退化程度的盐碱草地中,各种酶活性的季节变化幅度不同,过氧化氢酶、多酚氧化酶和碱性磷酸酶活性在中度、重度盐碱化草地中的变化幅度大于轻度盐碱化草地,而过氧化物酶、蛋白酶和转化酶活性在中度 ...
YUE, WANG, WANG, YAN
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