黄土丘陵区安塞县县域粮食生产潜力及其开发

Potential grain productivity and its exploitation of a county in Loess hilly-gully region

鉴于黄土高原丘陵沟壑区人口-粮食-资源-环境问题日益严重,利用机制法计算了该区典型县域(安塞县)主要粮食作物和县域光合、光温、气候和自然生产潜力,以及当前各层次粮食生产潜力开发程度。在系统分析影响粮食产量提高和潜力开发的限制因子基础上,研究认为,为进一步发掘粮食生产潜力,该地区应大力开展基本农田建设、科学增加辅助能量投入、合理调整粮食作物结构以及提高科技贡献率。

The issues of population, grain, resource and environment in Loess hilly-gully region are now becoming increasingly serious, attracting more and more attention from scholars and government. Aiming to alleviate the pressure on grain security imposed by ecological de-farming there, potential grain productivity should be stressed so as to know how to exploit it. Ansai County was selected as the study area and potential photosynthesis productivity, potential temperature productivity, potential precipitation productivity and potential land productivity for main grain plants and the whole county were estimated by using mechanism methodology, and the degree of potentiality being exploited was calculated. Based on analyzing the restricting factors to increasing grain yield and exploiting its potentiality, the paper holds that people should build basic farmland extensively, add assistant energy input scientifically, adjust grain crop structure properly and increase science and technology contribution efficiently, in order to exploit grain potentiality further and settle down grain security problem there.