水稻分蘖与主茎同伸叶片大小的定量关系及其对氮素的响应

Quantitative relationship between size of synchronously emerged leaves on tillers and on main stem of rice and the response to nitrogen application

为了建立基于同伸关系的水稻叶面积模拟模型,为虚拟植物的构建提供支撑,在盆栽条件下,以常规粳稻南粳44和杂交籼稻II优107为材料,设置不同施氮量处理并进行定株测量,分析了分蘖叶片叶长、叶宽与同伸主茎叶片叶长、叶宽的定量关系及其对氮素的响应。结果表明,同龄分蘖的同伸叶片具有相近的叶片大小,叶长宽比主要与叶片在分蘖上的叶位有关,而与分蘖的位置关系不密切;分蘖叶片与主茎同伸叶片的叶长宽比随叶片在分蘖上的叶位的提高而增大,约在叶位达到7时,叶长宽比达到1,这一关系可以用分段函数来描述,氮肥和品种对这一关系没有明显影响。

In order to support simulation of leaf area index of rice （ Oryza sativa L. ） and virtual plant structuring based on synchronously emerging characteristics, different nitrogen rate treatments were set using conventional japoni-ca rice Nanjing44 and indica hybrid rice Eryou107 as materials under the condition of pot culture, and the quantitative relationship between leaf blade length and width on tillers and those on main stem, and its response to nitrogen condi-tion were analyzed. The results showed that synchronously emerged leaves on tillers with the same leaf age showed similar leaf blade size. Leaf length and width ratio are related to leaf position on the tiller, as apposed to tiller position. With the raising of leaf posi-tion, leaf length and width ratio increase. The length and with of the seventh leaf was the same. This relation-ship could be described by piecewise functions, and was＆amp;nbsp;not affected by nitrogen application and varieties.