| 1. | Carbon fixation by farmland ecosystems in china and their spatial and temporal characteristics
我国农田生态系统碳蓄积及其变化特征研究 |
| 2. | Studies on the energy and material use efficiency of cultivated grassland and farmland ecosystem in the hilly regions of southern china
南方丘陵地区人工草地和旱作农田能量物质利用率 |
| 3. | In farmland ecosystems , soil organisms are main regulators in the decomposition , nutrient mineralization and other ecological processes of soil
在农田生态系统中，土壤动物是分解作用和养分矿化作用等生态过程的主要调节者。 |
| 4. | The input - output energy ratio of farmland ecosystem has remarkably negative relationship with organic fertilize energy input , so energies of ecosystem are wasted
农田系统的能量产投比与有机肥投能呈显著负相关，系统投能过量，造成能量损失。 |
| 5. | Both total carbon absorption and emission of costal farmland ecosystems were increased from 1981 to 2001 , but the increasing rate of carbon emission exceeded that of carbon absorption
总碳吸收和碳排放从1981年以来都呈增加的趋势，但碳排放的增长超过了碳吸收的增长速度。 |
| 6. | We propose to integrate the life strategy approach and trophic group classification to obtain a better understanding of nematode diversity and their functions , so as to use nematodes as effective bioindicators in farmland ecosystems
建议通过综合土壤线虫的生活史策略和营养类群等信息，深入了解其生物多样性和土壤生态系统功能，从而更好地发挥土壤线虫对农田生态系统变化的生物指示作用。 |
| 7. | This paper introduces the main factors influencing soil nematode diversity in farmland ecosystems , reviews the present situation in the nematode diversity research field and presents the research prospect of nematode diversity in the future
本文介绍了农田生态系统中影响线虫多样性的主要因素；回顾了土壤线虫的物种多样性、营养类群多样性、生活史多样性和功能多样性的研究现状；并提出了今后农田生态系统线虫多样性研究的重点。 |
| 8. | Form feature of farmland ecosystem and ecological security angle of the region set out , analyzing affection of farmland landscape pattern to ecological environment , bring to light that spatial heterogeneity and fragmented of farmland landscape pattern are important influence factor to land ecological environment security in the farming stock - raising in this paper
从区域农田生态系统特点和地区土地生态安全角度出发，通过对市域农田景观空间格局特征及其对土地生态环境安全影响的分析，显示出农田景观格局的空间差异性与破碎度高是农牧交错地区土地生态环境安全的重要影响因素。 |
| 9. | The ecosystem service functions of gansu is analyzed from six facts , such as grassplot ecosystem , forest ecosystem , watershed ecosystem , farmland ecosystem , desertification ecosystem and city ecosystem . this thesis simulates a latent ecosystem using vegetation type map to explain preferably how landscape pattern impacts the service function of ecosystem . the unit price of every service function is known by annual average value schedule of global ecosystem service function
为了更好地说明景观格局变化对生态系统服务功能的影响，通过植被类型图模拟了潜在生态系统，根据全球生态系统服务功能的年平均价值一览表查得各服务功能单价值，将其服务功能价值进行计算并与现实生态系统服务功能价值进行比较得出：由于现实生态系统人为的干扰作用，使得生态系统服务功能价值降低了1022 . 85 10 ~ 6美元。 |
| 10. | The total carbon absorption of china costal farmland ecosystems was 15644 . 2 x 104t in 1981 and increased to 22482 . 4 x 104t in 2001 with increasing rate of 44 % . but the total carbon emission was 1512 . 86 x 104t in 1981 and increased to 5559 . 31 x 104t in 2001 with increasing rate of 265 %
其中，沿海十省区农田生态系统碳吸收总量从1981年的15644 . 2万吨上升到2001年的22482 . 4万吨，上升了近44 ；而碳排放总量从1981年的1512 . 86万吨上升到2001年的5559 . 31万吨，增长了265 。 |
