A layer loss in soil profile is a sign of soil nutrient loss.
土壤剖面中a层的流失是土壤养分流失的标志。
Soil nutrient map is an application map about soil nutrient condition .
土壤养分图是反映土壤养分状况的应用图件。
The structure variance of soil nutrient is bigger than the random variance.
毛竹林土壤养分的结构性变异大于随机变异。
The study of soil nutrient characteristics is a part of soil research of lava plateau.
熔岩台地上土壤的养分性质研究只是熔岩台地上土壤研究的一部分。
CULTURE is the memory of life hidden in the blood, the soil nutrient for ART to burgeon.
“文化”是潜藏在血液中的生命记忆，是“艺术”发芽的土壤养分。
The soil nutrient in different rangeland stapes was gradually decreased with soil depth.
不同草地类型土壤养分含量的变化是随着土层加深而降低。
The results showed that the soil nutrient in the different logged land have obvious differences.
结果表明，不同采伐林地土壤养分有明显的差异。
Knowing the soil nutrient fertility is the basis to formulate a suitable fertilization strategy.
掌握土壤养分肥力状况，是制定施肥策略的基础。
The method of regional soil nutrient management was studied based on systematic cluster analysis.
探讨了基于系统聚类分析对大田小麦进行区域化土壤养分管理的方法。
Tillage treatments affect soil nutrient in soil profile, soil nutrient content, and fertilizer use ratio.
不同耕作处理能影响土壤养分的剖面分布和养分含量及肥料的利用效率。
The study provided a reference for improving the model of soil nutrient transfer in runoff on the loess slope.
该研究为进一步完善黄土坡面径流养分迁移模拟模型提供了参考。
According to the classification criterion of soil nutrient, the soil fertility in this area is at a middle level.
按照土壤养分含量分级标准其土壤肥力属中等水平。
Man made accelerated erosion is a key reason for soil nutrient loss after forestlands were disturbed by human being.
林地被人为开垦破坏后，加速侵蚀是导致坡面土壤养分流失的根本原因。
The 202 soil samples were analyzed and diagnosed by using the systematic research method of soil nutrient condition .
应用“土壤养分状况系统研究法”对吉林省202个土壤样品化验分析和生物诊断。
The effects of soil nutrient factors on potato yield and commodity rate were studied in different ecological conditions.
研究了不同生态条件下，土壤养分因子对马铃薯产量和商品薯率作用效果。
The soil nutrient losses were connected with soil texture, water content and fertilizer quantity, and lands utilize way.
土壤养分的流失程度与土壤质地、雨前含水量和施肥量以及土地利用方式有关。
The environment factors, such as gradient, aspect and position of the slope, had effect to some extent on soil nutrient.
坡度、坡向、坡位等环境因子对土壤养分有一定的影响。
Besides, the two systems were significantly different in soil nutrient content and soil physical and chemical properties.
而且两者耕层土壤的养分含量和理化性质等指标也有明显差异。
The results showed that the soil nutrient had semi-variance structure in bamboo forest, and most of them were spherical model.
结果表明，毛竹林土壤养分存在半方差结构，多数为球状模型。
The fine-roots of Betula platyphylla forest have quick decomposition rate, so it plays an important role in soil nutrient return.
白桦林细根分解较快，在土壤养分归还方面能发挥重要作用。
It is considered that active soil organic matter had influence on soil nutrient, plant growth, environment, atmosphere and human kind.
土壤有机物质的活性成分是对土壤养分、植物生长乃至环境、大气和人类有影响的有效物质。
Based on field experiment and laboratory analysis, regular pattern of variation of soil nutrient was studied in south of the Loess Plateau.
以野外试验和室内分析相结合的方法，研究了黄土高原南部黄土侵蚀时养分变化的规律。
Based on soil tests in different regions of Jilin province, this paper evaluated soil nutrient state and acid-base reaction in forestry nursery.
本文通过不同区域点位土壤测试，对吉林省林业苗圃土壤养分状况、酸碱反应进行了评价。
The designing principle, construction and realizing method of a portable and high accurate soil nutrient photoelectric colorimeter are described.
介绍了一种便携式高精度土壤养分光电比色仪的结构、工作原理和实现方法。
The increase of amount of fertilizer application was the main reason for the result of soil nutrient increase from the planting structure changes.
施肥量的提高是种植结构变化导致土壤养分提高的主要原因。
The technology of soil nutrient map digital mapping is studied taken suitable area for Chinese gooseberry in Zhouzhi County, Shannxi province as a case.
本项目以陕西省周至县猕猴桃适生区土壤养分调查制图为例，进行了土壤养分图数字制图技术研究。
The results showed that biological organic-inorganic compound fertilizer expressed quite important effects on yield, quality of tomato and soil nutrient.
结果表明：生物有机无机复混肥对番茄产量、品质和土壤养分有重要的作用。
Employing organic fertilizer could ameliorate the character of soil, increase the capacity of soil nutrient providing and advance soil biological activities.
施用有机肥可以改善土壤性质，提高土壤养分，增加土壤的生物活性。
Studies have shown that the soil nutrient loss has strong connection with its content, and the accumulation of soil nutrient can increase the loss potential.
农业面源污染物质氮、磷流失是与土壤营养物含量之间存在较强的联系，土壤营养物的累积可增大流失风险。
A study was conducted to evaluate the soil nutrient status of poplar plantations by soil nutrient Systematic Approach (SNSA) in Jianghan Plain, Hubei Province.
应用土壤养分状况系统研究法(SNSA法)对江汉平原杨树人工林土壤养分状况进行了评价。
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