nutrient cycle的例句大全

According to the research and practice on nutrient cycle of black locust forest stands in the area of gulled loess plateau, some key problems in the research of nutrient biogeochemical cycle have been discussed.

根据对黄土残塬沟壑区刺槐林地养分循环的研究和实践，对有关养分生物地球化学循环研究中遇到的若干问题进行了讨论。

Effects of cultivation system on nutrient cycle of purple soil

耕作制度对紫色土养分循环的影响

In order to fertilize the soil fertility, the model of nutrient balance demands that the surplus of N should be over 40% so as to achieve a good nutrient cycle in the oases agro-ecosystem.

为了培肥地力，模式养分平衡要求N盈余在40%以上，以实现绿洲农业生态系统养分良性循环。

Soil biological factors are important factors leading to the reduction of cotton output for the continuous cropped cotton, as well as important factor in promoting nutrient cycle and the growth of cotton.

土壤生物学因素不仅是导致棉花连作减产的重要因素，也是促进养分循环，促进棉花生长的重要因素。

A Study of the Nutrient Cycle in Aerially Seeded Pinus massoniana of Hunan Province

湖南省马尾松飞播林的养分循环研究

Nutrient cycle in three types of standing density of aerially seeded Pinus massoniana of were also studied in this paper.

对3种不同密度类型的马尾松飞播林分的养分循环进行了研究。

Marine heterotrophic nanoflagellate ( HNF), as a key link in microbial loop, plays an important role in the material cycle, energy flow and nutrient remineralization of marine ecosystems.

微型异养鞭毛虫作为海洋微食物环的关键环节之一，在海洋生态系统的物质循环、能量流动和营养盐再生等方面扮演极其重要的角色，是当代海洋微食物环研究的重要对象。

Research on Biological Cycle of Nutrient Elements in Plantation of Rubber Intercropped with Amomum Longiligulare

橡胶与砂仁间作复合生态系统营养元素循环的研究

Studies on the stand net productivity and biological cycle of nutrient elements in the 29 year old plantations of Chinese fir on different rotations

不同栽杉代数29年生杉木林净生产力及营养元素生物循环的研究

Compared with other vegetables, solanaceous vegetables has long growth cycle, great nutrient needs and common fertilizers are generally difficult to meet its growing demand.

相比其它蔬菜，茄果类蔬菜具有生长周期长，养分需求量大的特点，常规肥料一般难以满足其需求。