复种指数

基于GIS的复种指数潜力研究

A Study on Cropping Index Potential Based on GIS

联系复种指数与时间序列NDVI曲线的纽带是农作物年内的循环规律。

Crop growth dynamic can be monitored by the time series of NDVI data .

遥感估算区域蒸散进展明显，已提出了多种遥感估算模式。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

Great progress has been made in remote sensing estimation of regional ET with several regional ET estimating approaches developed . A Study of Calculating Multiple Cropping Index of Crop in China Using SPOT / VGT Multi-Temporal NDVI Data

黑龙江省复种指数为1，推算农业需水为400～500mm，而多年平均年降水量多数大于400mm，有发展雨养农业可能；

Multiple cropping index number is 1 in Heilongjiang Province . The agricultural water demand deduce amount is 400 ~ 500 ? mm , however , the average annual rainfall most is more than 400 ?

利用建立的复种指数潜力模型计算全国1km尺度的复种指数潜力，并使用空间统计方法得到全国及分省的复种指数潜力。

Then this paper calculated the cropping index potential over China with 1 km resolution based on the model the paper proposed . The cropping index potential of the whole China and each province were obtained by using the spatial statistical methods .

土地当量比和复种指数的应用研究

Application of Land Equivalent Ratio ( LER ) on Sequential Cropping

复种指数增加了7.3个百分点，达到163.3%；

Cropping index made 7.3 % increment and reached 163.3 % .

复种指数遥感监测方法研究

Study on Remote Sensing Methods for Monitoring Multiple Cropping Index

近20年中国耕地复种指数的时空变化

Remotely Sensed Multiple Cropping Index Variations in China during 1981-2000

论提高我国南方耕地复种指数

On the increase of multiple cropping index of cultivated land in southern China

复种指数潜力；

Potential of Multiple Cropping Index ;

提高作物复种指数是保障我国粮油作物安全供应的重要举措。

To improve the crop cropping index is an important measure to ensure the grain and oil safety supply .

其次，劳动力的转移影响农业种植结构，普遍的趋势是劳动力的外出转移使种植结构趋向单一，耕地的复种指数下降；

Secondly , labor transferring affects the agricultural planting structure which trends singleness , descend of multi-cropping system index .

通过提高复种指数，使粮食作物播种面积稳定在1.1亿公顷左右。

The grain-sown area will be stabilized at about 110 million ha through the increase of the multiple crop indexes .

浙江省耕地复种指数在空间分布上表现为西南大于东北。

It was found that the sequential cropping index in southwest is bigger than northeast in Zhejiang Province in the space .

研究发现，森林覆盖率、作物复种指数以及单位劳动投入等因素对土壤侵蚀作用显著。

It is shown that forest coverage rate , crop replanting index and unit labor input have significant effects on soil erosion .

进行复种指数监测对全国农业资源利用评价、粮食生产安全以及全国农情遥感速报都有非常重要的现实意义。

Actually , it is very important and great meaningful for agriculture resources assessment and countrywide food security to monitor multiple cropping index .

作物育苗移栽种植技术因其使作物生长期提前以及能够提高复种指数，在农业生产上具有重要意义。

Seedling nursing and transplanting technique has significant benefit in crop growth because of its effects of early harvest and planting index increment .

要促进集约化农区水土资源的可持续利用，只有降低复种指数，减少耗水作物，特别是小麦的播种面积。

Such measures as reducing multiple cropping index , and reducing the wheat area should be taken to improve the sustainability of water resources .

耕地灌溉率、复种指数、耕地灌溉面积、粮食产量不断提高；

At the same time , the multiple cropping index , irrigation area , grain yield and the rate of irrigation had been improved increasingly .

虽然该村土地撂荒并不算多，但该村土地的复种指数不高、亩产也不高。

Although not much village land is not abandoned , but the index of multiple crop is not high , and yield is not large .

复种指数先增后降，先由105.48%增加到149.23%，后又降低到119.8%，近年呈现稳定发展趋势。

Cropping index enhances from 105.48 % to 149.23 % , then reduces to 119.8 % , and has a steady increase trend in resent years .

高产的主要原因是灌溉面积大、复种指数高、精耕细作和增施化肥。

The main reasons for the high yield are the large irrigating areas , high multiple crop index , intensive and meticulous farming and fertilizer application increase .

结果表明：1997&2002年水资源对复种指数的贡献度逐渐增大，平均增长10%以上。

The results showed that the contribution of water resources to multiple cropping index in the 1997-2002 is gradually increasing , the average growth over 10 % .

结合后备资源潜力、现有耕地再发挥潜力、坡耕地改造潜力和种植制度改革，分析了提高复种指数的潜力途径，并提出相应的水土资源可持续利用与管理对策。

Then some countermeasures on sustainable use and management were put forward in the areas , combined with the analysis on potentials of land and water utilization .

在粮食高产前提下，要不断提高复种指数和光能利用律，使农业更为盈利。

Under the precondition of high grain production , cropping index and light energy utilization should be put up continuously so as to make agriculture more profitable .

该文以我国华北平原为研究区域，提出了基于小波变换的耕地复种指数遥感提取方法。

This study choose the North China Plain as study area and proposed a new method of multiple cropping extraction from remote sensing data based on wavelet transform .

攀西地区下湿田增种早春作物，是充分利用春季光温资源，提高复种指数的有效措施。

Increasing planting early crops on the wetland is an effective measure to fully utilize the spring season resources of temperature or light and raise multiple crop index .

统计验证表明，复种指数提取结果与不同尺度的统计数据均有很高的一致性。

Statistical validation shows that there is great consistency between extracted multiple cropping index and statistical data at different scale . So the results of this dissertation are believable .

2003年湖南省化肥投入量188.3万t，折合单位面积施肥量260.0kg/hm2（扣除复种指数），在全国处于中等施肥量水平，施肥仍有一定的增产、增效空间。

Fertilizer input of Hunan province was 1.883 million tons in 2003 , which equals to 260.0 kg / ha ( deducting multiple cropping indexes ), reaching middle fertilizer application level .