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本文是根据秧田播种量和每丛插秧本数联因试验的结果,证明在肥水管理水平较高的条件下,稀播少本插比密播多本插具有明显的增产作用。指出稀播少本插在水稻高产形成中的作用点在于增大穗形,而少本插又是形成大穗的主导因素。从群体的某些生理生态着手,阐明了稀播少本插的高产机理:秧苗素质优良和本田个体生育健壮是稀播少本插大穗高产的生物学基础;合理的茎叶配置和较厚的叶片,是稀播少本插净光合生产率较高的生态基础;生育后期的物质生产速度快,运转效率高,是稀播少本插大穗高产的生理基础。从而认为,稀播少本插不仅是一项繁殖种子和节省本田用种量的措施;而且与相应的肥水管理技术结合起来,更是一项高产的有效措施。
This paper is based on seedling seeding rate and the number of transplanting each bundle of the results of the test results show that fertilizer and water management in the higher conditions, It is pointed out that the function of sparse planting is to increase the spike shape, while the spike insertion is the dominant factor to form big spike. Starting from some physiological groups, this paper elucidates the mechanism of high yield of sparse planting and seedling insertion: the excellent quality of seedling and the healthy growth of individual in Honda Of the leaves, thin seedlings is inserted thin net photosynthesis productivity higher ecological basis; late growth of material production speed, high operating efficiency, thin seedling is inserted less spike high yield physiological basis. Therefore, it is considered that not only is the plan of thinning and planting less is not only a measure of breeding seeds and saving the amount of Honda seeds, but also a measure of high yield and efficiency in combination with the corresponding fertilizer and water management techniques.