| 1. | There is a great contrast between nutrient cycles in natural vegetation and the nutrients involved in growing an arable crop .
天然生长的植物与人工栽培的作物在营养循环方面有很大的差异。 |
| 2. | A study on nutrient cycling of pine stands in eastern part of china
中国东部主要松林营养元素循环的比较研究 |
| 3. | Nutrient cycling in the
苇田养分生物循环的研究 |
| 4. | Characteristics of nutrient cycling in mountainous grassland ecosystem of jian ' ou city
建瓯市丘陵山地草地生态系统营养元素循环研究 |
| 5. | Effects of canopy interception on water and nutrient cycling in the chinese fir plantation ecosystem
林冠截留对杉木人工林生态系统物质循环的影响 |
| 6. | The relationship of soil nutrient cycling characteristics with productivity of terrace millet on hilly loess plateau
黄土丘陵区梯田谷子养分循环特征与生产力关系的研究 |
| 7. | China is the world ' s oldest surviving civilization , largely on account of early adoption of rice culture and good nutrient cycling
中国堪称最古老的世界文明之国，在很大程度上应归功于水稻生产以及良好的地力循环。 |
| 8. | Deregulation of agricultural input markets for pesticides , fertilizers , diesel fuel , and seeds resulted in high rates of agri - chemicals in irrigation water and low rates of organic nutrient cycling in this region
一度以种植业和棉花为主的政策已被市场经济所代替。农药化肥柴油和种子等农业生产资料市场的变化，使生产者必须考虑经济效益最佳的生产和投入水平。 |
| 9. | We suggest that new technologies such as the c and n isotope technique for nutrient cycling and the image analysis approaches for soil micro - structure should be applied on earthworm ecological research in order to better understand the functions of earthworms
其他新技术如研究养分循环的碳氮同位素分析和揭示土壤微结构的图像分析等技术的应用是蚯蚓生态功能研究的迫切需要。 |
| 10. | The ecological functions of earthworm include : ( 1 ) effects on key soil ecosystem processes such as decomposition of soil organic matters and nutrient cycling ; ( 2 ) effects on soil chemical and physical properties ; and ( 3 ) interaction with plants , microorganisms and other animals
蚯蚓活动及其在生态系统中的功能受蚯蚓生态类群、种群大小、植被、母岩、气候、时间尺度以及土地利用历史的综合控制。 |
