2) cropping index
复种指数
1.
The calculated area for cropland by Wackernagel's method does not consider the influence of cropping index.
从理论角度采用复种指数修正耕地类生态足迹,使核算结果为耕地面积,增强了生态足迹和生态承载力的可比性。
2.
In accordance with the new characteristics of the cropping system in 1990s,the significance of intercropping,relay cropping,multiple cropping and cropping index was analyzed in this paper.
针对９０年代种植制度变革的新特点，分析了间套作、复种及复种指数的意义，讨论了区别间套作的共生期标准、作物标准熟期与熟数系数以及面积系数等概念，提出了多样化的多元多熟种植条件下复种指数的计算规则和方法。
3.
Through taking the regionalism as analysis unit,the relationship between agricultural water production ratio,irrigation intensity and area,and cropping index in Shanxi province is studied.
应用农业标准产量概念,建立农业水分生产率评价方法,以行政分区为分析单元,研究山西省农业水分生产率与灌溉强度、灌溉广度以及复种指数之间的关系,评价区域农业水分生产率状态,分析了不同区域水分生产率及单位标准产量高低的原因,为山西省水生态修复工作的开展提供基础资料。
3) multiple cropping index
复种指数
1.
Study on Remote Sensing Methods for Monitoring Multiple Cropping Index;
复种指数遥感监测方法研究
2.
A Study of Calculating Multiple Cropping Index of Crop in China Using SPOT/VGT Multi-Temporal NDVI Data;
中国农作物复种指数的遥感估算方法研究——基于SPOT/VGT多时相NDVI遥感数据
3.
After liberation the middle subtropics was considered the most increasing extent for multiple cropping index in China.
解放后，我国复种指数以中亚热带增幅最大，亚热带和热带是我国复种指数差异最大的地区，若能缩小这一差异，就是发挥复种潜力，进一步提高我国复种指数。
4) pressure index of cultivated land
耕地压力指数
1.
The results showed that: the cultivated land area,the total output and the quantity per capita of grain had been increasing,the pressure index of cultivated land had trended to decrease obviously between 1981 and 2006;but in the comin.
本文运用耕地压力指数模型分析了内蒙古1978年以来耕地压力的变化规律,并结合SPSS软件,对其未来耕地压力的变化趋势进行回归分析。
5) index of cultivated land pressure
耕地压力指数
1.
In this paper,the Spatio-temporal characteristics of cultivated land pressure and driving factors are analyzed based on the theory and model of cultivated land pressure index,and the tend of future index of cultivated land pressure is forecasted.
根据耕地压力指数理论和模型,分析了陕西省耕地压力的时空变化规律及成因,并对未来变化进行了预测。
6) Cropland pressure index
耕地压力指数
1.
Based on the latest researches from the scientific world in and out of China,the cropland pressure index model.
在充分借鉴国内外学术界最新研究成果的基础上,运用耕地压力指数模型对河北省粮食安全进行评估。
2.
Basing on all of these study, using minimum cropland average per capita and cropland pressure index model as a means to analyze 10 years’ changing characteristic of this two variant .
选取全国退耕还林第一县——吴起县为研究对象,对吴起县自1997-2006年耕地变化动态与粮食生产情况进行了分析研究,运用最小人均耕地面积和耕地压力指数模型法,在分析吴起县1997-2006年10年间耕地、人口、粮食动态变化的基础上,总结了该区域最小人均耕地面积和耕地压力的变化特点,并以此为基础提出了保障吴起县耕地动态平衡和粮食安全的一些建议。
3.
Based on the minimum cropland per capita,cropland pressure index model and the smooth extrapolation time series forecasting methods,the dynamic changes of food production,cropland pressure index from 1950 to 2004 in Ningxia Hui Autonomous Region were analyzed and predicted for next 15 years.
本文基于最小人均耕地面积、耕地压力指数模型和时间序列平滑外推预测的方法对宁夏回族自治区自建国以来50多年进行粮食生产、耕地压力指数作动态变化分析,对未来15年的粮食生产、耕地变化、人口、耕地压力指数预测。
补充资料：复种指数
全年农作物总播种面积与耕地面积的百分比。一般情况下，它与热量高低成正比。计算公式为：全年农作物总播种面积耕地面积×100%。复种指数愈大，说明耕地利用程度愈高。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条