活动被土壤养分含量状况所制约。
Biological activity in a soil is influenced by soil acidity and nutrient status.
草原土壤养分含量与气象因子相互关系的研究。
Study on the Interrelationship among Nutrient Content of the Steppe Soil and Meteorological Factors.
按照土壤养分含量分级标准其土壤肥力属中等水平。
According to the classification criterion of soil nutrient, the soil fertility in this area is at a middle level.
果园之间各种土壤养分含量的变异系数均在10%以上。
All variation coefficients of nutrient contents in soil were over 10%.
土壤侵蚀主要通过影响土壤养分含量来影响土壤生产力。
Generally, its main approach is affecting contents of soil organic matters and nutrient.
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 soil nutrient in different rangeland stapes was gradually decreased with soil depth.
对桤木人工林细根、土壤养分含量的季节变化及其两者之间的关系进行了研究。
This paper made a dynamic study of the seasonal variation of nutrient elements in the fine roots and soil from Alnus cremastogyme Burk plantations, and of the relationship between them.
在立地条件一致的前提下，研究了落叶松人工林土壤养分含量的年动态变化趋势。
On the premise of identity for site conditions, the annual dynamic changes of soil nutrients under larch plantation were studied.
土壤养分流失在开垦初期非常迅速，开垦耕种5 a后，土壤养分含量可减少5 0 %。
Soil nutrients abruptly loss in the beginning stage of forest removal. After five years of forest removal, soil nutrient content reduces by 50%.
结果表明：施用有益微生物组合加菌糠可以促进小白菜生长、增加其产量和提高土壤养分含量。
Indicated that application the beneficial microorganisms combination adding waste meterial could promoted growth, increased yield of Brassica pekinesis and improve soil fertility.
通过对人工种植黄花草木樨样地的监测，根据土壤养分含量的变化研究了改良退化土壤的效果。
The effect of Melilotus officinalia on improving degraded soil is studied according to the change in nutrient content of soil after planting.
2000年海淀区农田耕层土壤养分普查结果表明，全区土壤养分含量整体处于中等水平以上。
Soil nutrients analysis was carried out in Haidian District in 2000. It was showed that soil nutrients content in Haidian was at middle level in general.
通过对研究区6种不同利用模式下土壤养分指标的测定，对比分析出各利用模式间土壤养分含量水平和差异显著性。
Soil nutrient index of 6 different utilization patterns in research area was measured. Significance of difference and soil nutrient level in different utilization patterns were comparatively analyzed.
高度风化的酸性红壤，受亚热带气候及不合理利用影响，土壤养分含量偏低，尤其是土壤磷素的含量及有效性也很低。
Influenced by the subtropical climate and unreasonable use in deeply weathering red soils, the nutrient content is lower, especially the validity of phosphorus.
以褐土类潮褐土亚类潮垆土土属黑底潮砂泥土土种为研究对象，探讨长期定点不施肥对土壤养分含量及作物产量的影响。
This paper studied the effects of no fertilization on soil nutrients and crop yield in meadow cinnamon soil in Tangyin County.
本文论述了自1980年调查以来冀东滨海稻区耕地土壤养分的变化状况，分析了土壤养分含量变化的原因，提出了改良途径。
In this paper, we discuss soil nutrients change status of paddy rice land in Jidong coastal area since 1980, to analyse the reasons and put forward a modified way.
利用地统计学方法对龟峰段土壤养分的空间变异性研究表明：龟峰段土壤养分含量的空间变异强烈地受到人类土地利用方式的影响。
According to the spatial variability characteristics of soil nutrient contents in the Guifeng Section, the soil nutrient contents were greatly affected by the mode of land use by man.
在陕西眉县选择农田土壤养分含量不同的地块，研究不同含量的有机质，碱解氮、速效磷、速效钾与玉米果穗穗部性状及产量的关系。
In order to study the relationship between yield, maize ear treats and organ matter, N-OH, available P and K, we selected field block with different soil nutrition in Mei county, Shaanxi province.
通过对半悬索道集材后林地土壤理化性质的分析，结果表明：半悬索道集材后土壤容重增加，土壤结构和水分性能变差，土壤养分含量下降。
The results showed that after skidding operation, the soil density increased, the soil moisture condition got bad, the soil porosity and the contents of soil nutrients decreased.
大豆覆膜增加了土壤水分与速效养分含量。
It increased plough layer soil water and available nutrients content.
土壤的主要特性有质地、酸度、养分含量、气体含量和含水量。
The major characteristics of soils are texture, acidity, nutrient content, gaseous content, and moisture content.
林分生长与林地土壤中全n、全k以及有机质等养分的含量显著相关。
It also shows that the growth of plantation is greatly affected by the content of soil nutrients specially total n, total K and soil organic matter.
微生物的数量分布与土壤酶活性、有机质含量、土壤养分状况等强弱呈正相关关系。
The quantities distribution of rhizosphere microorganisms were positively correlated with the soil enzymic activities, contents of organic matter and soil nutrients.
并测定和比较了2年生银合欢林地和相应荒地的土壤剖面性状及养分含量。
The feature of soil profile and the contents of soil nutrients were determined after 2 years plantation of leucaena.
这与SC27促进土壤养分有效化，提高植株叶片中氮、蛋白质、糖和淀粉含量有关。
SC27 could improve available nutrient contents in soil and increase the contents of nitrogen, protein, sugar and starch in leaves of watermelon and balsam pear plants.
但施肥能明显提高土壤有效养分含量。
Fertilization can increase the contents of soil available nutrients.
土壤有机质含量、全量养分含量和速效养分含量均在采伐初期2～5年增加，随后又迅速减少，尤其是表层土壤变化更为明显；
The organic matter content as well as the total and available contents of nutrients increased at the first 2~5 years, and then declined rapidly, especially for those in topsoils.
土壤速效养分含量是多年培肥土壤形成的，不属当年施肥。
The content of quick effective nutrient of soil is formed by applying fertilizer for years.
研究了梅州沙田柚两个果园的土壤养分、结果树营养叶片不同生育时期的矿质元素含量及季节性动态变化情况和各元素的相互关系。
The soil nutrients, the contents and seasonal dynamics of mineral elements as well as the relationship among the elements in leaves of fruit-bearing trees of Citrus grandis Osbeck cv.
结果表明：城市土壤演变过程中土壤物理性质和养分含量发生了明显的变化。
The results showed: There were apparent changes of physical properties and nutrition content in the evolution process of city soil quality.
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