摘要
本文概述了当今农业发展面临的几个问题:1.谷物增长速率下降。人口增长速率上升,提高人均谷物日趋艰难;2.全球农作物经济学产量和生物学产量渐近极限,传统农业不堪承受予期负担;3.人均占有耕地直线递减,农业投入效益指数逐年下降,化肥农药伴生环境污染。这些问题予示了传统耕作模式急待变革。
Several obstacles confronted in the current agricultural development are described; 1)It has become more difficult than ever before to increase the per capita possession of grain yield because of the reduction in the growth-rate of grain in the world and accelerating expansion of population;2)As agricultural yields no matter in terms of economics or biology are approaching their maximum limit the current agricultural couldn't bear the anticipant load appearing in the future; 3)The world grain area per capita has been reducing ceaselessly. The benefit index of agricultural input is decreasing year by year. Using chemical fertilizer and pesticide are always followed by their pollution to the environment. It is pointed out in this paper that the transforming the current agriculture is ugently necessary.
出处
《生态农业研究》
CSCD
1993年第1期39-44,共6页
Chinese Journal of Eco-agriculture
关键词
农业
耕作
谷物
Agricultture
Cultivation
Grain
