论文部分内容阅读
夺取小麦高产的重要措施之一,是合理调整植株群体结构,促使植株个体与群体协调发育,充分发挥光、热、气的有效作用。最大限度地提高植株绿色部分对太阳辐射能的截获率,增加光合产物,增加籽粒产量。现将不同播种方式(即调整株行距)组成的不同群体结构,对光、热、气的利用,作粗略分析。一不同群体结构与光、风的关系在一定面积上的农作物群体大小,排列方式,极大地影响对光能的吸收利用,影响株间风速的流通和二氧化碳的交换。据试验观测:小麦分蘖前,各种播种方式组成的群体结构对接受太阳辐射能无明显差异。因为株植矮小,叶片细长,尚造成遮荫,太阳光能够充分地分配投射于田间。随着生长发育的旺盛,拔节以后株间叶片封闭量增加,光、温、气的影响显得突出起来。
One of the important measures to seize the high yield of wheat is to reasonably adjust the plant population structure and promote the coordinated development of plant individuals and groups, giving full play to the effective role of light, heat and gas. Maximize the green part of the plant interception rate of solar radiation, increase photosynthetic products, increase grain yield. Now different sowing methods (that is, adjusting the row spacing) composed of different groups of structures, the light, heat, gas utilization, make a rough analysis. The relationship between structure of different groups and light and wind The size and arrangement of crop groups on a certain area greatly affect the absorption and utilization of light energy and affect the circulation of wind speed and the exchange of carbon dioxide. According to experimental observation: before tillering of wheat, the population structure of various sowing methods had no significant difference in receiving solar radiation. Because of the stunted plants, the leaves are slender and still shaded, the sunlight is well distributed to the field. With the vigorous growth and development, the number of closed leaves increased after the jointing, and the influence of light, temperature and gas became prominent.