免费日韩片_欧美成人精品一区二区男人小说_国产乱码一区二区三区四区_国产精品国产三级国产aⅴ入口_成人看的污污超级黄网站免费_欧美一级在线免费观看_成人午夜免费无码福利片_国产乱人伦偷精品视频色欲_aaa少妇高潮大片免费看_国产精品1234_亚洲精品国产suv一区88_中文字字幕在线中文无码_精品亚洲区_午夜九九九_国产av国片精品jk制服丝袜_色综合亚洲_亚洲成av人片无码bt种子下载_欧美色就色_精品少妇的一区二区三区四区_男人用嘴添女人下身免费视频

By Liu Yan, Information Center, Cheng Yu, Research Department of Rural Economy, DRC

Research Report No 36, 2016 (Total NO 4919) 2016-3-28

Abstract: With a strategic position for China's agricultural production and national food security, major grain producing areas contributed 75% of the national grain output and 90% of the increase in grain production (except 2007 and 2009). However, the constraints of water resources in major grain producing areas have become increasingly grim. On one hand, food production is facing water resource constraints due to limited per capita water resources and asymmetrical balance between soil and water resources. On the other hand, the level of water resource development and utilization of grain production is not high. The extensive irrigation method has led to serious waste of water, and the serious degrading of irrigation facilities has resulted in backward mechanism. Therefore, it is an urgent need to improve the utilization of agricultural water resources in major grain producing areas. It is recommended that we should establish an overall control on agricultural irrigation water amount as well as a quota management system. We should make coordinated efforts to strengthen infrastructure construction of farmland irrigation, and introduce and innovate high efficiency and water saving irrigation engineering. In addition, we should establish an integrated protection system of farmland, water, irrigation and drainage, and further improve the farmland water conservancy management system.

Key words: agricultural water resources, utilization, major grain producing areas