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油菜的群体是由个体的器官根、叶、茎、枝、荚所组成。高产油菜的群体结构要求适当较高的群体器官数量和质量,而数量越大其间的矛盾越大,不足或过度均难以高产。为此,有必要研究本地区的一般品种的合理群体结构及其个体与群体矛盾尖锐化的临界点,充分发挥光能利用效率,构成较高的经济产量而用较少的肥料。我国在稻麦高产群体结构方面研究卓有成效。油菜研究密植幅度和个体性状多,群体结构研究少。生产上曾学长江上游稀植5—7千株。由于我地温、水、肥条件不能满足其个体充分发育的要求,并常有旱、冻、涝、阴等自然灾害出
Rape’s population is composed of individual organs, leaves, stems, branches, pods. The population structure of high-yielding rape requires a suitably higher number and quality of population organs, while the greater the number, the greater the contradictions between them are. Therefore, it is necessary to study the reasonable group structure of common breeds in this region and the critical point of sharpening the contradictions between individuals and groups, give full play to the utilization efficiency of light energy, and constitute a relatively high economic yield with less fertilizer. Our research on high-yielding population structure of rice and wheat has been fruitful. Rapeseed density and individual traits study more, less research on population structure. The production has learned to dilute the Yangtze River upstream plant 5-7 thousand. Because of my temperature, water, fertilizer conditions can not meet the requirements of their full development, and often drought, freezing, waterlogging, Yin and other natural disasters out