查询词典 soil

At the same time, the salt in the layer of soil has experienced from low to high then to low. In the alluviation fan and the top of alluvial plain, the soil salt form gathering is strong, that is to say, the content of salt relatively high in the layer of soil, but reduced in the bottom of soil. At the bottom of valley, the salt content increase from upper and bottom of soil, especially at the desert edge, this kind of trend is more obvious. Differentiation of soil characteristic was exited in mountain-basin system, and agriculture development should follow this rule.

土壤盐分空间变化规律明显：在前山区地带，土壤含盐量低；在冲积扇、冲积扇缘及冲积平原上部绿洲区，土壤耕层总盐高、表聚性强；从冲积平原中下部到亁三角洲绿洲，耕层盐分含量依次降低，但剖面盐分含量呈现依次增加趋势，形成盐分聚集的漏斗效应，尤其进入沙漠边缘区，这种趋势更加明显。

Based on field experiment and measure data, ecological characteristics of soil water in different fencing sandy land in arid desert area and vegetation restoration effect of soil water variation in fencing sandy land were analyzed. In representation of Artemisa arenaria DC population, observing and researching vegetable restoration effect of soil water variation in fencing sandy land. The results indicate as follow:(1)With the vegetation development constantly in fencing sandy land, soil water utilization of vegetation increased. It made soil water content and soil water storage reduced with the increase of fencing time in sandy land.

本文通过野外实验测定数据，分析研究了干旱荒漠区不同类型封育沙地土壤水分生态特征，以及封育沙地土壤水分变化对植被恢复的影响，并以当地沙蒿种群为代表，观测研究封育沙地土壤水分变化对植被恢复的影响，结果表明：(1)封育沙地随着植被的不断生长，植被对土壤水分的利用也有所增加，从而使沙地土壤含水量和储水量随封育时间的加长而表现为一定的降低趋势。

Main obstacle reasons in soil of succession planting vegetables in protected cultivation were reviewed from soil maleficent microorganism increment, soil-borne diseases and insect pests to aggravation, soil nutrient imbalance, soil hypo-salinization, soil acidification and plant autotoxicity.

0引言随着我国蔬菜生产的发展，设施蔬菜栽培面积不断扩大，由于设施栽培的特点是采用人工控制，使设施内部形成了一个特殊的生态环境，且多年连作和大量施用化肥，忽视有机肥使用等，使蔬菜生产出现了各种障碍问题，其严重影响了蔬菜生产和农民收益，并成为制约蔬菜生产可持续发展的瓶颈问题。

The main results were as follows:There was significant correlation between the soil urease and phosphatase activities, which showed no significant difference upon different plots. The urease and phosphatase activities in the soil were higher in spring than autumn, which under mangrove plants were all higher than those in the New alluvial soil without plants and Bared land. Soil urease activity exhibited no significant difference under different mangrove species. The phosphatase activity in the soil of Centenary Aegiceras corniculatum and Spartina alterniflor was the highest, which was the higher in the soil of Kandelia candel and Avicennia marine.

结果表明：土壤脲酶和磷酸酶活性存在极显著的相关性；两种酶在不同区域间均无显著差异，季节变化均表现为春季大于秋季；有红树植被的土壤脲酶和磷酸酶活性皆大于空地和裸地，土壤脲酶不同红树植被下无显著差异，磷酸酶则表现为百年生桐花树和互花米草显著高于其余植被，秋茄和白骨壤次之。

The effect of Zea mays and Bromus riparius on soil and water loss were studied,the experiment was conducted to plant crop and grass in runoff-plots on the 15 degree slope naturally,the bare slop is CK,then the runoff and soil erosion amount and the biological characteristics of corn and meadow bromes termly were measured,and difference of soil and water loss prevention effect on the slop land were determined.The results showed that soil and water loss became less after both corn and meadow brome planting.And the leaf area and the coverage of meadow brome higher than corn,which was benefit for less soil and water loss at the rain season early.Meanwhile,roots of corn and meadow brome mainly distributed in 0-10 cm soil layer,and the root biomass of meadow brome was 2.88 times than that of corn.

试验在自然降雨条件下，在15°坡地设置作物与牧草径流试验小区，以裸地为对照，在每次降雨之后用全深剖面采样器取样，测量其径流量和土壤侵蚀量，定期测定玉米和草地雀麦的生物学特性，研究玉米与草地雀麦生物学特性变化及其坡地水土流失防治效果的差异，探索植物种植对坡地水土流失的主要影响因素，结果表明：种植玉米与草地雀麦，对坡地水土流失均有一定防治作用，但是，与玉米相比，草地雀麦的叶面积指数和覆盖度可在雨季前达到较高水平，有利于早期坡地水土流失防治。

Copper contaminated soil was selected, Brassica juncea and Elsholtzia splendens plants were used, then simulation experiment, hydroponic culture, column leaching experiment and pot experiment were conducted to study (1) effects of organic chelants on the Cu specition in soil solution and soil soild phase;(2)Effect and mechanism of organic chelants on plant growth and Cu uptake by plant;(3) nutrient addition on plant growth and Cu accumulation;(4) limitation of chelant in soil;(5) Desolving on nutrient and heavy metals in soil and their environmental risk by chelant application and (6) effects of degradable organic chelant and microbial materials on plant growth and phytoremediation efficiency of Cu contaminated soil.

选择铜污染土壤，利用印度芥菜和海州香薷植物，通过室内模拟试验、水培试验、土柱淋溶试验、温室盆栽试验，开展了以下六方面的工作：（1）有机络合剂对土壤铜固-液相形态、浓度变化的影响；（2）有机络合调控对对植物生长与铜吸收的影响及其机理；（3）养分调控对植物生长和铜积累的影响；（4）有机调控剂的作用时限；（5）有机物对土壤养分、重金属的络合溶解和淋溶作用与环境风险；（6）可降解络合剂及微生物菌剂对海州香薷修复污染土壤的效应。

To better understand the soil erosion resistance of the different soil in south China so as to provide the necessary basic data for the forecast of regional soil erosion, planning of soil using, assessment of soil using and the potential fatalness of soil environment.

为更好的了解我国南方不同类型土壤的抗蚀性能，以便为区域土壤侵蚀预报、土地利用规划、土地利用评价和土壤环境潜在危险性评价等提供必要的基础数据。

The results indicated that the concentration of Cu in the soil is 220.16 mgkg^(-1) contrast to the CK 500.31 mgkg^(-1) significantly decrease when the concentration of EDTA in the soil is 2 mmolkg^(-1) that explains EDTA treatment significantly decreased soluble Cu content in soil because of translating into Cu of water distill floating on the surface of soil and most accumulating around root. Contemporary, application of EDTA to the soil significantly enhanced mobilization of Cu in soil and increased Cu uptake in shoot of Leersia hexandra Swartz., the highest concentration in the leaves 336.54 mgkg^(-1) is 4 times higher compared with the ck 80.34 mgkg^(-1). However, citric acid, oxalic acid and malic acid inhibited mobilization of Cu and less significantly affected shoot Cu accumulation.

结果表明，当向土壤中施加质量摩尔浓度为2mmolkg^(-1)的EDTA时，土壤中Cu质量分数为220.16mgkg^(-1)与空白土壤中500.31mgkg^(-1)相比明显减少，说明EDTA可以极显著的降低土壤中的铜质量分数，使其转化成水提取态的Cu浮于土壤表面，并大部分聚集在根部周围，同时向土壤中施加EDTA不但促进了对Cu的活化而且显著提高了李氏禾对Cu的吸收，叶中最高质量分数达到336.54mgkg^(-1)是对照中80.34mgkg^(-1)的四倍；而柠檬酸、草酸和酒石酸则抑制了Cu的活化，但对李氏禾地上部分的Cu质量分数影响不大。

Based on the soil fertility and fertilizer effect of Beijing brown chao soil in the way of microtrial of winter wheatsummer maizer continuous cropping,the annual grain yield and the tenyear soil organic matter change show that the crops yield,soil organic matter and soil fertility can be improved significantly by using N P K chemical fertilizers together with organic material under lower soil fertility.

通过对北京褐潮土土壤肥力和肥料效益监测基地10年定位微区试验的调查分析表明：在土壤肥力水平较低的情况下施用氮、磷、钾化肥及氮磷钾化肥与有机物料配施，具有显著提高粮食产量的作用，并较大幅度提高土壤有机质含量；随着有机物料施用量的增加，效果更为明显。

Shanghai Impregnant Factory located in the Park of World Expo 2010 Shanghai was set up 70 years ago and abandoned for 10 years. The quantities of soil microorganisms, soil enzyme activities, soil chemical properties and their relationships under Cinnamomum camphora community, Metasequoia lyptostroboides community, Nerium indicum community and Cinnamomum camphora+Ligustrum lucidum shrub community in the factory were studied. Results showed that the differences in soil properties were significant in upper soil layer (0~20 cm) and the vertical distribution rules of soil properties were different under four plant communities.

对2010年上海世界博览会规划园区内，已废弃的上海市溶剂厂的绿地低干扰下的香樟群落、水杉群落、夹竹桃群落、香樟和女贞灌丛群落的土壤微生物数量、土壤酶活性及土壤化学性质等特性及其关系进行分析。

A historical region of southwest France between the Pyrenees and the Garonne River. The duchy of Aquitaine was joined with France after the marriage of Eleanor of Aquitaine to King Louis VII in1137, but its possession was disputed after her subsequent marriage to Henry II of England.

阿基坦法国西南部一个历史地区，位于比利牛斯山和加隆河之间，在1137年阿基坦的埃莉诺与国王路易斯七世结婚之后阿基坦公国加入法国，但当她再嫁英国亨利二世后，其归属权便受到争议

There are moments when I look at the smiling , happy faces of my expectant staff and wonder how they will cope when confronted by an outraged housemaster along with an unrepentant and recalcitrant bleached blond teenager in 18 years ' time .

有时候，我看着那些满怀期待的员工微笑，幸福的脸，想着当他们遇到一位愤怒的宿舍管理员和一位不知悔改，叛逆，而且将头发染成白色的18岁少年时，他们会如何处理。