Results 51 to 60 of about 791 (148)
Shuitu Baochi Xuebao, 2011 元谋干热河谷冲沟沟头土壤的渗透性是制约坡面径流,遏制沟头前进的重要因素,也间接影响着沟头土体崩塌方式.通过对元谋干热河谷区,3种典型土壤(燥红土、变性土和古红土)沟头表层土壤结构指标的测定和对入渗速率的野外定点观测,分析表层土壤结构特性及其分维特征对入渗过程的影响.结果表明:燥红土和变性土土壤结构要优于古红土;土壤颗粒和微团聚体分维数随着粉粘粒(＜0.02 mm)含量的增加而增大,随着砂砾(0.02～2 mm)含量的增加而减小;孔隙分维数与颗粒分维和微团聚体分维呈负相关.3种土壤的入渗速率较低 ...
陈安强, 张丹, 魏雅丽, 刘刚才
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Greenhouse Gas Mitigation and Yield Response to Biochar-Microbial Amendment in Saline-Alkali Soil [PDF]
[Objective] To investigate the effects of combined application of biochar and microbial fertilizer on greenhouse gas emissions and sunflower yield in saline-alkali soil under plastic film mulching and drip irrigation.
JI Wentao +6 more
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Shuitu Baochi Xuebao[目的] 砾石是影响土壤孔隙和水分入渗的重要因素,明确砾石通过改变哪些土壤孔隙特征进而影响水分入渗具有重要意义。[方法] 以西南喀斯特地区砾石含量高的石灰土为研究对象,采用CT扫描和室内一维土柱入渗试验,对比分析2种砾石粒径(2.0~5.0,5.0~12.5 mm)和5种砾石含量(0,10％,20％,30％,40％)条件下的土壤孔隙特征及水分入渗特性,并使用结构方程模型探究土壤孔隙特征与入渗特性之间的耦合关系。[结果] (1)含砾石土壤的大孔隙度、孔隙连通率、孔隙形状因子 ...
黄光灵 +5 more
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Shuitu Baochi Xuebao, 2017 通过连续2年田间试验，研究了5种改良剂：秸秆、有机肥、生物炭、炭基改良剂I和炭基改良剂Ⅱ对紫色丘陵区坡耕地土壤水分库容、孔隙度和团聚体组成及稳定性的影响，分析了土壤水分特征参数与孔隙度和团聚体组成的关系，以期为紫色土区水土保持和土壤改良提供科学依据。与不施改良剂（对照）相比，5种炭基改良剂都能提高土壤对降水的截存和保贮能力，显著提高了土壤饱和含水量、田间持水量、水分总库容、有效水库容及重力水库容，降低了土壤凋萎点含水量和无效水库容；不同改良剂提升作用大小为改良剂Ⅱ＞改良剂I＞生物炭>有机肥＞秸秆 ...
柴冠群 +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, 2021 为了研究中国西南水梯田的土壤水分特性，以云南哈尼梯田为例，选取哈尼梯田核心区全福庄小流域内林地、荒草地、旱地和水田4种土地利用类型，分层取0—10，10—20，20—40，40—60，60—80，80—100 cm深度土样测其主要土壤理化指标和土壤水分特征曲线，分析其土壤的持水性和水分有效性。结果表明：（1）哈尼梯田4种不同土地利用类型土壤容重变化范围为0.61~1.41 g/cm3，且0—40 cm与40—100 cm差异性显著，土壤有机质含量为1.17%~9.65 ...
李源, 宋维峰, 马建刚
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Exploration on the surface water leakage mechanism of travertine pools in Salix cupularis shrub area of Huanglong Scenic Spot, Sichuan Province [PDF]
Recently, some travertine landscape groups in Huanglong Scenic Spot have been degraded to varying degrees. Surface water leakage, blackening and desertification have occurred on a large scale in the dense distribution area of Salix cupularis shrub, which
Dong SUN +8 more
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[Progress in preparation of plant biomass-derived biochar and application in pesticide residues field]. [PDF]
Se Pu, 2022 Zhang X, Zhen D, Liu F, Peng Q, Wang Z.
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Shuitu Baochi Xuebao, 2018 为进一步探究γ-聚谷氨酸在农业方面应用，将不同γ-PGA含量（0，0.1%，0.2%，0.5%，1%）施入无团粒结构的砂壤土与粉壤土中，研究了γ-PGA在土壤物理结构及持水特征方面的作用。结果表明：随γ-PGA含量的增加，同一吸力下土壤持水量增加，VG模型中参数α值均大于对照组，n值递减。γ-PGA添加至1%时，砂壤土中容重降低0.087 g/cm3，孔隙度增加3.28%，粉壤土中容重降低0.108 g/cm3，孔隙度增加4.08%，添加γ-PGA降低了毛管孔隙比例，提高无效孔隙比例，表明γ ...
曾 健, 费良军, 陈 琳, 杨 扬
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Shuitu Baochi Xuebao, 2011 对大兴安岭山地樟子松天然林土壤水分物理性质及水源涵养能力进行研究,结果表明,0-20 cm土层土壤含水量、土壤毛管孔隙度、总孔隙度、枯落物蓄积量和蓄水量均表现为:坡下>坡中>坡上,土壤含水量变化范围为278.71~377.98 g/kg,平均值为327.67 g/kg;整个坡面土壤毛管孔隙和总孔隙度平均值分别为29.08%和53.15%;枯落物蓄积量和最大蓄水量分别为16.72,53.24 t/hm2。0-20 cm土层土壤容重随坡位降低有减小趋势,其平均值为0.84 g/cm3。土壤非毛管孔隙 ...
李奕, 满秀玲, 蔡体久, 盛后财
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