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.

这些可持续园艺方法返回有机质的土壤，减少水土流失微生物的损失，提高土壤养分含量。

These sustainable gardening methods return organic matter to soil, reduce microorganism loss through erosion and improve soil nutrient content.

五种地貌类型上的植物组成、植被覆盖率、土壤养分特征和土壤颗粒组成都具有明显差异。

Therefore phytocoenosis , vegetation coverage rate , characteristics of soil nutrient , consisting of soil particles markedly differ from each other in…

研究了刺槐、绒毛白蜡纯林及其混交林中不同土层在不同季节的土壤养分含量、土壤酶活性的变化。

The soil nutrient contents and soil enzyme activities of different soil layers at different seasons in pure and mixed stands of Robinia pseudoacacia and Fraxinus velutina were studied.

土壤养分含量和吸附试验由国际农业服务公司 ( 美国 ) 完成.

The soil nutrient contents and adsorption experiments were completed by Agro Service International Inc. ( USA ).

根是植物吸收土壤养分的地下部分。

Roots are the underground parts of a plant that take in soil nutrients.

对华南赤红壤丘陵坡地不同侵蚀部位土壤养分和微生物特性的变异性进行了对比分析。

The variation of soil nutrient and microbe on different erosion position of hilly Slope in the latosolic red soil region were studied.

经相关分析，土壤养分、马铃薯产量与三种土壤酶活性呈显著或极显著相关关系。

Through correlation analysis, an obvious relationship existed between soil nutrients, potato yield and three kinds of soil enzyme activities.

快速测定土壤养分含量的方法和检测仪器的研制，已成为精确农业发展的必需。

It is necessary to study the rapid soil nutrient measuring methods and apparatus for the development of precise agriculture.

坝上地区土地利用与覆被变化对土壤养分的影响。

Soil nutrients not only have spatial variability, but also change with the time.