关中平原的自然条件与农业生产

本文通过关中平原自然条件时空变化的规律与农业生产关系的分析,指出充分利用有利条件,调整作物布局是提高该区粮棉产量的可行措施之一。文中采用相关分析法,对各生态因子与产量之间的关系作了定量分析,找出干燥指数是决定该区作物布局的主导因素。因此,以干燥指数1.50的等值线把关中平原分为东西两个种植区,提出了作物布局调整的建议,并对此进行了经济效益检验,证明本文的分析是正确的,提出的增产途径是可行的。

Natural Condition and Agricutural Production in Guan Zhong Plain

In this paper the regular changes of natural conditions in space andtime, and the relationship between the regular changes and agriculturalproduction in Guan Zhong plain are analyzed. The paper also points outthat adjusting the crop distributions according to the favourable factorsis a good method of increasing grain and cotton outputs in the plain. Thetechniques of correlation analyses are adopted to analyez the quantitativerelationship between ecologic factors and crop outputs in the paper. Andwe find out that. the mean annual arid index is the dominant factor affe-cting crop distributions. So, the plain may be divided into two differ-ent planting regions according to the isopleth 1.50 of the mean annualarid index. The suggestion of the adjusting crop distributions is conse-quantly put forward, its economic benifits is also tested. The result ofthe test proves that our analyses are right and the ways for increasingoutput are feasible.