| 1. | The impact on agriculture created by changes in the economy , society , and environmental resources
农地资源的利用调整提高土地生产力农户及农户人口的变动反映经济快速发展 |
| 2. | Short - term profit motives have led china ' s farmers to use polluting plastics , chemical fertilisers and herbicides in abandon
中国的农民在大量使用农膜、化肥、农药和除草剂等来提高土地生产力以获得短期利益。 |
| 3. | The results prove land degradation through influence land productivity and per capita agriculture total value to influence peasants per capita income
发现土地退化是通过影响土地生产力进而影响人均第一产业总值来影响农民人均收入。 |
| 4. | Utilizing the principal component analytical method and analyzing driving factor that influenced farmland change of anhui province the result included to factor that as population - economy and that of land productive force
结果表明，影响安徽省耕地变化的因素有两个方面：人口社会经济因素和土地生产力要素。 |
| 5. | The input - output analysis showed that the agriculture structure did not correspond with land structure . in the constitution of all products , plantation occupied the most and it was the main income resources
主成分分析产生11个综合评价指标，以此对小流域土地利用的土地生产力、生产稳定性、土地保护性、经济可行性和社会可接受性分别进行评价。 |
| 6. | Virtual plant model has an important significance in forecast of crop yield , evaluation of soil productivity , analysis of resource direction of crop planting , study of crop growth mechanism and crop reaction to environment
摘要虚拟植物生长技术对作物产量预测、土地生产力评价、资源环境分析、作物栽培指导、作物生长机理研究以及调控作物生长发育及其对环境的反应研究都有著十分重要的意义。 |
| 7. | The excess utilization for human on land result in a series of evil consequence , for example , the increase of soil and water loss , the degradation of eco - environment , the decrease of bio - diversity severely and the decline of land productivity
目前，人类对自然的过度利用导致水土流失加剧、生态环境退化、生物多样性剧减、土地生产力下降等一系列恶果；同时，环境退化已成为经济发展的制约因素。 |
| 8. | The results can be used to understand dynamics of soil nutrient transfer in slope land , provide essential for establishing model of soil potassium loss by erosion , recommend rational fertilization application , and increase land productivity
研究成果对深化坡面土壤养分迁移动力学研究有一定的理论意义，可为建立土壤坡面钾素径流流失模型提供基础资料，并对坡地合理施肥、提高土地生产力有一定的指导作用。 |
| 9. | The results indicate that ( 1 ) land production is on the basic development level , the restrictive factors of land production are the ratio of land production , product of crop , the area of medium and low production , multiple crop index
研究结果表明：土地生产力处于基本可持续发展阶段。土地生产率、公顷粮食产量、中低产田的面积、复种指数等对土地生产力的持续发展起限制作用；资源环境保护从初步可持续发展到基本可持续阶段。 |
| 10. | The research of soil degradation in pur country is mainly concentrated on the red earth hilly area in the south in the past , and is less on the loess plateau that is one of the most fragile areas . based on field experiment and laboratory analysis , discuses the degradation mechanism , and raises the methods of refreshing and reestablishing land productivity of huangshan soil in chunhua county of shaanxi . in the hope of serving development of western regions and ecological environment construction that concede the land to forestry ( the grass )
我国以前对土壤退化问题的研究主要集中于南方红壤丘陵区，对生态环境最脆弱的黄土高原地区的土壤退化研究相对较少，故本文以黄土高原地区陕西淳化县的侵蚀性黄?土为对象，通过野外人工模拟降雨试验和室内分析相结合的方法，探讨了侵蚀性黄?土的退化机理，提出了恢复和重建黄?土土地生产力的途径和方法，以期服务于西部大开发和退耕还林(草)的生态环境建设。 |
