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- soil surface acidity 土壤表面酸度
- This creates mulch on the soil surface. 这可以在土地表面形成覆盖物。
- The distance of the water table below the soil surface must be adjusted. 必须调整土壤表面以下水位的距离。
- Surface acidity of CLM probably originates from the pillars and its surface hydroxy. 表面酸性可能来源于柱子和表面羟基,柱子的热稳定性对表面羟基,表面酸性均有较大影响。
- Surface acidity is one of the important surface chemical properties of silicate clay minerals. 摘要表面酸性是硅酸盐黏土矿物的重要表面化学性质之一。
- In our experiment desirable results were obtained by covering the soil surface with plant ash and fine sands. 经试验,用草木灰和细砂覆盖地面的方法,造成干燥的生态条件,对控制发生效果显著;
- These treatments adjust effectively the surface acidity and pore structure of mordenite. 这些处理过程有效地调节了丝光沸石的表面酸性和孔结构。
- Herbs, perennial, acaulescent or shortly caulescent, ascending, rosette but rarely closely appressed to soil surface. 多年生草本,无茎或短茎,上升,莲座丛但很少紧密地贴伏于土表。
- Mulches prevent crusting of the soil surface, thus improving the absorption and movement of water into the soil. 覆盖物可以防治土壤表层板结,使水份容易被土壤吸收。
- Ultrasonic conductometric titration (UCT) is an easy, quick and reliable method for determining surface acidity of zeolites. 对影响超声振荡电导滴定法测定分子筛表面酸性质的因素进行了考察。
- Fig. 4. Pycnidiospore survival of Didymella bryoniae placed at soil surface, 5, 15, and 30cm below ground at field. 四、在土壤表面、地表下5、15及30公分土壤深度的瓜类蔓枯病菌柄孢子存活情形。
- The pillar structure, thermal stability and surface acidity of the pillared clays were investigated by ~(27)Al-NMR, XRD, DTA, IR, Py-IR, TPD. 用~(27)Al-NMR、XRD、DTA、IR、吡啶吸附-IR、正丁胺吸附-TPD等手段表征了柱结构、热稳定性和表面酸性。
- The study of herbicide deposition on soil surface and wheat stubble in different wheat mulch conditions is conducted. 研究了不同兑水量情况下,除草剂在免耕麦茬土壤表面和麦茬上的沉积规律。
- The effects of B, Mg and B-Mg modifications on the surface acidity and the catalytic performance of HZSM-5 were studied by Py-IR. 采用Py-IR分析研究了硼(B)、镁(Mg)及B-Mg复合改性对HZSM-5分子筛表面酸性和催化性能的影响。
- Indeed the ecology is destructed continuously and the soil surface nutrition is also washed out. 于自然生态环境中,生态演替和气候转变不断在进行,但速度是相对缓慢的。
- Ti/Zrpillared rectorie have 202.434 m~2/g BET surface area,0.930 8 g/mL~3 loosen landslide density and its surface acidity <+3.5. T i/Z r层柱累托石的BET比表面积为202.;434 m2/g;表面酸性<+3
- Area of existing vegetation con't. seed to the soil surface where they may compete with the new native grass plantings. 现有植被种子不可落在土壤的表面,因为他们将会与新的天然牧草争夺养分。
- Besides, the conversion of ethanol have been found to be dependent on the amount of surface acid sites on zeolites. 乙醇转化率与分子筛表面酸量有关。
- Taproot long-cylindric, deep-rooted with a slender and elongated stem to soil surface. 直根长圆筒状的,根深具一纤细和拉长的茎达土壤表面。
- The relationship between surface acidity and alkylation reaction catalytic activity of modified Y zeolite was studied on fixed-bed reactor by FT-IR. 用红外光谱法研究了改性Y型分子筛的表面酸性,并考察了烷基化反应活性与酸性质的关系。