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1·It is the key to protect the function of agricultural ecosystem service to check the environmental pollution.

遏止环境污染是保护农业生态系统服务功能的关键。

2·Exotic invasive plants of agricultural ecosystem were surveyed at 205 samples of 21cities in Guangdong province.

本研究对广东21市农业生态系统中205个样点外来入侵植物进行了调查。

3·Agricultural ecosystem is a complicated man-made ecosystem and the increase of its productivity is the main object of agricultural production.

农业生态系统是复杂的人工生态系统，提高其生产力是农业生产的主要目标。

4·In agricultural ecosystem, they supply nutrients for crops with degraded plant residues and keep soil characteristics which are necessary to plant growth.

在农业生态系统中，土壤微生物通过降解植物残体为植物提供营养，同时维持植物生产所需的土壤性质。

5·The active C pool and CPMI(C pool management index) of soils under different agricultural ecosystem were discussed using potassium permanganate oxidation in this paper.

用高锰酸钾氧化法讨论了土壤活性碳库和碳库管理指数（CPMI）。

6·In the four agricultural ecosystem of Huzhou City the forest-grass ecosystem was the most stable and the Mulberry ecosystem easiest to suffer the lack of the trace elements.

湖州市四种农田生态系统中，以林草系统最稳定，而桑园系统最容易发生土壤微量元素的缺乏状况。

7·The grassland agricultural ecosystem, including the primary production system, the second production system, social system and so on, is the biggest among the terrestrial ecosystems.

草地生态系统是最大的陆地生态系统，包括草地植物生态系统、动物生态系统和人类社会系统等子系统。

8·Even in the agricultural ecosystem of a country renowned for endless fields of wheat, there is a coexistence of all elements of the food chain, from small farms to large power plants.

即使一个国家的农业生态系统以其一望无际的小麦而闻名，但从小型农场到大型发电厂，食物链中的所有因素都需要共存。

9·The statistical method of selecting optimum programme on the block diagram model of agricultural ecosystem is the method of using the statistical decision to seek the optimum from many pro-grammes.

选择“农业生态系统框图模型”最佳方案的统计方法，是从多种方案中，采用统计决策进行优选。

10·Nitrogen cycling in farmland ecosystem is one of the key factors to affect agricultural productivity and at the same time it affects the environment.

农田生态系统中的氮循环是影响农业生产力的主要因素之一，同时也会对环境产生影响。