论文部分内容阅读
１９９４～１９９５年在沈阳农业大学校内试验地研究了紧凑型和平展型两个类型玉米品种的生长发育规律。不同密度、肥力条件下玉米冠层内的光分布、光截获、光合速率、气孔阻力的变化规律，不同密度、肥力条件下，冠层内透光率和冠层高度呈指数变化，回归方程通式为ｙ＝Ｋｅｘｐ（ｂｘ）。随着叶面积指数的加大，冠层内随叶层的加深光照强度降低，群体光合速率随密度增大而减少，气孔阻力随密度增大而加大。
From 1994 to 1995, the law of growth and development of two types of maize varieties, compact and flattened, was studied experimentally in Shenyang Agricultural University. Under different density and fertility conditions, the light distribution, light interception, photosynthetic rate and stomatal resistance of corn canopy under different densities and fertility conditions showed that under different densities and fertilities, the light transmittance and canopy height in canopy changed exponentially, and the regression equation The formula is y = Kexp (bx). With the increase of leaf area index, the light intensity in the canopy decreased with the deepening of the leaf layer. The photosynthetic rate of the population decreased with the increase of density, and the stomatal resistance increased with the increase of density.