摘要
从分析自然选择和人工选择在目标和方向上的重大差异入手,指出自然选择的核心是生存竞争,其结果产生个体优势;人工选择的方向是群体优势,其目标是获得较高的经济产量。作物是典型的人工选择的产物,研究作物的生产过程就应当以降低个体的竞争能力和提高繁殖分配为主。据此,对小麦植株高度。
As we know, crop production is a colony process. But how to research crop production as a colony process is still unsolved. Through analysing the orientation and results between natural selection and artificial selection, this paper indicated that both selections result in competition for the existence of the natural population, and in improving economic yield of the artificial population, respectively, and orientations of both selections are colony superority for artifical popula tion, and individual superority for natural population. So researches of crop production should be made great efforts on decreaing individual competion ability and increasing reproductive allocation. On the basis mentioned above, this paper also discussed problems on wheat heigh, root system size and application of population ecology in agricultural practices.
出处
《生态学报》
CAS
CSCD
北大核心
1997年第1期100-104,共5页
Acta Ecologica Sinica
基金
国家自然科学基金
关键词
作物生态学
种群生态
作物生产
crop production, population ecology, natural selection, artificial selection, wheat, water stress.