查询词典 fertile farmland

The result shows that: aquicultural waste water discharge respectively account for 75.1% of total nitrogen and 63.5% of total phosphorus; subsequently, the second main source of nitrogen and phosphorus is Domestic Sewage and Industrial Sewage drainage, which respectively equals to 20.5% and 30.7% of total nitrogen and phosphorus; in addition, farmland is not the main source, and only contributes to 4.4% of total nitrogen and 5.8% of total phosphorus.

结果表明，盐城海岸带主要陆源污染源中，养殖水域氮磷排放总量为7641t和480t，分别占排放总量的75.1%、635%；其次为居民工矿的生活生产污水，其氮磷排放量为2083t和232t，占总排放量的20.5%、30.7%；农田目前看来不是盐城海岸带主要的陆源污染源，排放量仅占4.4%和5.8%。

In the coastal zone of Yangcheng, terrestrial pollutions include the farmland run off, aquicultural waste water discharge, domestic sewage and industrial sewage drainage. The contribution of terrestrial nitrogen and phosphorus discharged into near shore was evaluated through literature survey and field investigation in the coastal zone of Yancheng.

文章采用野外实地调查和文献调研相结合的方法，从农田径流、养殖废水排放、居民生活污水和工业废水排放等几个方面，初步估算了盐城海岸带陆源氮磷污染负荷的分配情况。

It was suggested that the microclimate's edge influence depth at the interface of farmland and forest ecotone in west Jilin varied with time and space, and depended on the vegetation's aspection at the two sides of the interface and the intensity of human disturbance.

说明在农林边界，小气候影响域存在着时空变化，其范围取决于边界两侧植被的季相变化和人为干扰的强度。

Through the study of concentration of heavy metal in farmland from the city epigenetic irrigated area, the difference of their ability of beneficiation and health risks were analyzed and compared.

通过对试验区内玉米、小麦和土壤中重金属含量的研究，分析比较了作物对重金属的富集能力和健康风险。

On the leaving farmland, by surviving the seedling out rate, the feeding grass surviving rate, reviving rate, growth speed, tillering numbers, cluster measurement, degree of cover, root measurement, root Weight, fresh grass yield and hay yield, and so on, four kinds of feeding grasses which were Medicago sativa L., Dactylis glomerata L., Cichorium intybus L., Astragalus adsurgens Pall., were confirmed that can adapt the native ecosystem term and acquire good economic benefits in that year ; Bromus inermis Leyss. growed slowly in the first year, but Behaved well in the next year; Silpniumperfoliatum L.

弃耕地上通过对牧草出苗率、存活率、来年返青率、株高、分枝分蘖数、丛幅、根幅、根量、鲜草产量及干鲜比等的量测，确定苜蓿王、沙打旺、菊苣、鸭茅这四种牧草能适宜当地生态条件并于当年获得好的产量；无芒雀麦第一年生长较慢，但第二年表现良好；串叶松香目前为止表现不佳，能否引进成功有待观察。

Aagriculture activity ; Karst mountain ; Calcic farmland ; Sustainable use

农业活动；岩溶山区；石灰土耕地；持续利用

The dominant species of them were Artemisia halodendron Setaria viridis respectively; The reconverted grazing land and the natural reconverted farmland consisted of herb layer and microbiotic crust layer, but itsmain layer was herb layer. The dominant species of them were Cenchrus calyculatus Artemisia scoparia respectively.

草本片层的现阶段优势种为狗尾草；放牧自然恢复地和退耕自然恢复地均由草本片层和生物结皮片层构成，但其主要片层均为草本片层，该层现阶段优势种分别为黄蒿和光梗蒺藜草。

In Loess area, block cloddy was universal existence in farmland surface. The physical and chemistry properties of block cloddy in plow layer were researched in this study.

针对黄土地区农田土壤普遍存在块状结构体的现象，用蜡封法研究了块状结构体的松紧度以及用EDTA滴定法测定了结构体中水溶性Ca(上标 2+)含量。

Coccinella septempunctata in China is fairly well distributed, the distribution of the region in Beijing, Liaoning, Jilin, Heilongjiang, Hebei, Shandong, Shanxi, Henan, Shaanxi, Jiangsu, Zhejiang, Shanghai, Hubei, Hunan, Jiangxi, Fujian, Guangdong, Sichuan, Yunnan , Xinjiang, Tibet, Inner Mongolia and other places, commonly found in farmland, forests, gardens, orchards, etc..

七星瓢虫在我国分布相当广泛，分布的地区有北京、辽宁、吉林、黑龙江、河北、山东、山西、河南、陕西、江苏、浙江、上海、湖北、湖南、江西、福建、广东、四川、云南、新疆、西藏、内蒙古等地，常见于农田、森林、园林、果园等处。

Recently, Dr Copping organised a workshop on the impact of agronomic practice on the decline of farmland birds with particular reference to integrated crop management practices.

最近，由于农田鸟类数量下降对农业活动的影响，Copping 博士组织成立了一个工作组，专门研究作物综合管理措施。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。