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用外部形态与内部解剖相结合的研究方法,分析了大豆合理密植问题。不同种植密度引起的环境条件的不同,导致了外部形态和内部构造上的差异。最小密度每亩4千的单株,茎秆粗壮,株粒重高。茎横切面上输导组织、机械组织面积大,次生韧皮纤维细胞数多,基本组织面积较小。随着密度的增加,茎秆逐渐变细增高,株粒重变低,输导、机械组织面积逐渐变小,次生韧皮纤维细胞数大大减少,而基本组织面积逐渐增大。节位升高引起的内部结构的变化,与密度增加的变化趋势一致。每亩13千株密度是本试验中产量最高、接近理想群体的密度,其植株比较健壮,输导、机械、基本组织面积大小均处于中间水平。但由于群体、个体关系协调得好,单位面积产量最高。
With the combination of external morphology and internal anatomy, the problem of reasonable close planting of soybean was analyzed. Different planting density caused by the different environmental conditions, resulting in the external morphology and internal structural differences. The minimum density of 4,000 per acre plant, stem sturdy, heavy grain weight. Stem cross-section of the guide tissue, mechanical tissue area, the number of secondary bast fiber cells, the basic tissue area smaller. With the increase of density, the stalk became thinner and higher, the grain weight became lower, the area of the guide and the mechanical tissue became smaller, the number of secondary bast fibers decreased and the basic tissue area increased gradually. Changes in the internal structure caused by the increase in knot position are consistent with the trend of increasing density. The density of 13 plants per acre was the highest yield in this experiment, close to the density of the ideal population. The plants were relatively robust with the midway conduction, mechanical and basic tissue area sizes. However, due to the coordinated development of groups and individuals, the output per unit area is the highest.