The degradation, adsorption and mobility in water-soil system of herbicide are dominated factors to affect the bio-efficiency and lasting in the soil environment.
除草剂在水-土壤系统中的降解、吸附和迁移等环境行为是支配其在土壤环境中的生物有效性和持留性的重要因素。
Paraffin is a known carcinogen, and hydrogen peroxide can harm the digestive system. Chopsticks irresponsibly disposed of can contaminate water and soil quality.
石蜡是一种已知的致癌物，而过氧化氢则对消化系统有害。随意丢弃木筷则可能污染水和土壤质量。
It includes the chemical thermodynamic balance system of REEs, soil water physical characters and REEs flux in soil profile.
模型包括土壤中稀土化学热力学平衡体系、土壤水分物理形状和土壤剖面的稀土通量。
The design principles, system structures, system functions, system characteristics and operation environments of Agricultural Soil Water Engineering Information system (ASWEIS) have been introduced.
介绍了农业水土工程学科信息管理系统(asweis)的设计原则及系统的结构、功能、特点和运行环境。
Though water body initial acidity differed significantly, soil-water system acidity reached unanimity rapidly after flooding water.
尽管水体初始酸度差别很大，但土-水体系在淹水后酸度迅速趋于一致。
Such measures as row spacing reduced and close planting and furrow growing are propitious to optimize soil water flow system and they can greatly increase crop's yield and water use efficiency.
沟播处理、缩行密植等优化土壤水流动系统技术，均能较大程度地提高作物的产量和水分生产率；
The monitoring index system include such content as meteorology, vegetation, soil, bird, animal, soil and water loss, population, land using, livestock raising, economy and so on.
监测指标体系包括气象、植被、土壤、地形地貌、鸟类、兽类、水土流失、人口、土地利用、畜牧、经济等内容。
These experimental results show that conductometry is indeed a simple means to determine time it takes for ions to reach equilibrium in reaction in the soil-water system.
这些实验结果表明，电导法确是一种检测土壤—水体系中离子反应平衡时间的简易手段。
The study, based on the system of dynamics theory and SD model, simulated the balance between the water and soil of Ejina Oasis.
本文以系统动力学理论为基础，采用SD系统动力学模型，对额济纳绿洲水土资源平衡进行模拟研究。
Soil and water conservation fuzzy expert system is that the fuzzy technology is introduced into expert system to deal with fuzzy and indeterminate knowledge of expert in soil and water conservation.
水土保持模糊专家系统是把模糊技术引入专家系统领域，以处理水土保持专家知识中存在的大量的模糊性和不确定性。
Adsorption and desorption of fluorine at the surface of goethite is an important mechanism for fluorine migration and enrichment in the soil water system of the karst areas.
土层中针铁矿表面对氟的专性吸附及其解吸作用是岩溶地区土水系统中氟迁移和富集的重要机理。
The volatilities of four pesticides from vegetable, water and soil surfaces under laboratory modelling system were studied.
本文在室内模拟环境条件下，研究四种农药在蔬菜、水体和土壤表面的挥发作用。
The paper analyses the stress faced by the ecological system of Feiketu river basin due to project construction, vegetation damage, soil erosion, water pollution and overburden water use.
文章分析了蜚克图河流域工程建设、林草植被破坏、土壤侵蚀、水质污染、超负荷用水等使流域生态系统面临的威胁。
The study on construction technology of soil and water conservation forest system in large project district in semi arid desertification grasslands has been done.
同时对在半干旱荒漠草地大型项目区水土保持林体系的建设技术做了研究。
Irrational land use and forest cutting have resulted in the serious degradation, the decrease of land productivity and the water and soil erosion in the fragile soil system and forest system.
不合理的土地利用方式和对森林的不合理砍伐导致脆弱的土壤系统和森林生态系统的严重退化、生产力下降和严重的水土流失。
Agricultural pollution has a tridimension character of the complicated cycling system composed of water, soil, biosystem and atmosphere.
由于农业污染呈现水体、土地、生物、大气的大循环体的立体污染的特点。
At first, through analyse the influence on the soil, crops, groundwater and function of water body of sewage, the index system of sewage irrigation security appraisal have been set up.
首先，通过污水对土壤、农作物、地下水以及水体功能的影响分析，建立了污水灌溉安全性评价的指标体系。
Adopting appropriate irrigation system and soil management practices, the return water with low degree of mineralization can be reused.
采用混灌轮灌和良好的土壤改良管理措施，回归水可开发利用。
Water Harvesting Forestation System is mostly based on soil moisture ligament, It makes soil-plant-atmosphere consecutive system unite integer.
集雨绿化系统主要以土壤水分为纽带，把土壤植物大气这个连续的系统统一为一个有机整体。
In soil-plant-atmosphere system, soil available water content, crop water consumption, and effective precipitation are the main factors in water balance equation of farmland.
在土壤-植物-大气系统中，土壤有效水分贮存量、作物耗水量和有效降水量是农田水分平衡的主要组成因子。
Seasonal frozen soil is a special soil water system where ice and water coexist.
季节性冻土是一种冰水共存的特殊土水体系。
Due to the increase in nutrient input of the ecosystem and the decrease in the nutrient output from soil and water loss, the nutrients in the system are surplus.
由于间种山毛豆增加了生态系统的养分收入，减少了水土流失的养分支出，系统的各种养分出现了盈余的状况。
So that, according to the field study actual for many years, authors work the new evaluation system of the intensity of urban water and soil losses and its environment effect for reference.
因此，作者根据多年野外考察工作的实际，尝试性地总结出一套城市水土流失强度及其对环境影响的评价体系，供同行参考。
High rainfall variety and poor management of soil and water are the most important and limiting factors in crop system in this region.
年度降雨分布的极度不均和落后的土壤及水分管理措施是制约该地区农田生产力的主要因素。
Based on the physical analysis of water flow processes in soil-plant system, a universal model of cicruit analog for water flow in the system was developed in this paper.
本文在土壤—植物系统中水流过程物理分析的基础上，建立了该系统中水流电模拟最通用的非线性模式。
Then it carries on soil sample the experiment of the storing water system, including penetration coefficient determination experiment and capillary water rising experiment of the soil sample.
然后进行储水系统土样的试验，包括土样的渗透系数测定试验和毛细水上升试验。
Thus, several theoretical foundations that soil and water conservation influences its river system is set forth in this paper.
由此，提出了建议开展水土保持治理对河道系统影响的若干基础理论问题。
This paper reviewed the iron cycles in soil and water system including the groundwater, lakes and rivers.
综述了铁在地下水、湖泊和河流水源及相关土壤中循环转化的规律。
This paper reviewed the iron cycles in soil and water system including the groundwater, lakes and rivers.
综述了铁在地下水、湖泊和河流水源及相关土壤中循环转化的规律。
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