查询词典 turn up soil

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。

At first,ecological mat can effectively reduce soil temperature of the soil layer from 0 cm to 15 cm,in detailed,the average daily soil temperature can decrease 2.06℃ to 4.56℃,which is benefit to reduce soil evaporation in high temperature;During the rainless period,the soil moisture content covered by ecological mat is much higher than mobile sand,especially,the soil moisture content of the layer form 0 cm to 15 cm always keep ...

首先生态垫能够显著降低沙地0~15 cm的土壤温度，日均温可降低2.06~4.56℃，有利于沙地高温条件下减少土壤蒸发；在连续无降雨的情况下，生态垫下各层次的土壤含水量都高于流动沙丘裸地，尤其是15~30 cm含水量相对稳定，人工植被建立后，其保存率、生长量较流动沙地均有较大幅度的提高。

2Soil column leachate experiment shows, soil texture and soil section form are the main factors affecting the nitrate leaching; in soil organic fertilizer produce a nitrate leaching process, during five-month experiment, nitrate content has be increasing in leakage solution, organic fertilizer applying decrease the pH and increase the electric conduction of leakage solution, there is positive action between nitrate content in leakage solution and electric conduction, which shows that nitrate-N accumulation during organic fertilizer applying is one of the main factors for soil salification; for decrease the leaching of the nitrate-N in soil, in sandy moisture soil the best amount of organic fertilizer should be 7.5～ 15 t·hm~(-2), in Loamy moisture

在小麦-玉米轮作体系上投入化肥氮300kg·hm~(-2)N和有机肥22.3t·hm~(-2)折N261.2kg·hm~(-2，能使农田氮素收支达到平衡，在兼顾环境效益的基础上获得了较高的产量效益。并通过肥料效应函数和硝态氮累积效应函数进一步预测最佳施肥组合，即化肥氮施用量为N226.5kg·hm~(-2)，有机肥用量为39.9t·hm~(-2)折N466.8kg·hm~(-2，其中小麦季施化肥氮105.85kg·hm~(-2)N、有机肥30t·hm~(-2)折N351kg·hm~(-2，玉米季施化肥氮120kg·hm~(-2)N，有机肥9.9t·hm~(-2)折N115.8kg·hm~(-2。同时，磷素平衡分析表明，在施用有机肥的基础之上，化学磷肥的施用量应适量的减少或不施。

Soil ecological degradation can be defined as the process and phenomenon of a series of deterioration of soil ecological environment such as structural destruction and functional recession of soil ecosystem, decrease of soil biodiversity and productivity, dcsertification, drought, hardness, acidification and salination of soils, deficit and unbalance of soil nutrients, and loss of soil and water, resulting from human activities and adverse natural environmental conditions.

土壤生态退化是指由于人类活动及恶劣的自然环境条件作用或二者共同作用下造成的土壤生态系统结构破坏、系统功能衰退、土壤生物多样性减少、土壤生产力下降以及土壤荒漠化、干旱化、板结化、酸化、盐碱化和养分亏缺与失衡等一系列土壤生态环境恶化的过程和现象。

For the effection of its vertical distribution,the important factor is soil porosity,to a great extent,soil moisture and soil temperature produce effection forprotozoa through soil pore spece,the discontinuous dis-tribution of soil organic material and soil micro-organisms also is a important limiting factor.

影响其垂直分布的重要因素是土壤孔隙度，土壤水分和温度很大程度上也是通过土壤孔隙对原生动物产生影响的，土壤有机质和微生物的不连续分布也是一个重要的限制因素。

Based on the practical work of compiling scheme for water and soil protection, classification on soil pita and residue pita were made out. For soil pits, there were three categories: soil digging along contour line, soil digging at slope without striding over ridge, soil digging at slope bestriding ridge; and the residue pits were classified into four categories: low-lying, ditch, slope and flat pit.

根据我们编制水土保持方案的工作实践，对借土场和弃渣场分别进行了分类：借土场可分为沿等高线借土、不跨山脊坡面借土和跨山脊坡面借土三大类；弃渣可分为填洼弃渣、沟道弃渣、坡面弃渣和平地弃渣四大类。

But this is impossible, as long as it is engaging in a market economy, there are risks in any operation.

但是，这是不可能的，只要是搞市场经济，是有风险的任何行动。

We're on the same wavelength.

我们是同道中人。