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供试品种“细叶绿”在1000—2500蔸/亩种植密度下,随密度增加,叶片的比叶重增加,单位面积的叶绿素含量下降,光合速率有降低的趋势,在三季麻的生育后期都表现比较明显,高密度群体在光合速率日变化中具有优势。三季麻的单茎干物质积累分别表现出对数增长、直线增长、抛物线增长。收获时的地上部干物质分配,叶占50%左右,茎占46—56%,其中皮骨几乎相当。三麻时生殖器官占4%左右。日照辐射强时,叶的分配率增加。在1000—2500蔸的范围内,适当增加密度,有利于提高新麻园的纤维产量和质量。
Under the planting densities of 1000-2500 蔸 / mu, the leaf specific leaf mass per unit area increased, the chlorophyll content per unit area decreased and the photosynthetic rate decreased. All showed obvious effects. High-density groups had the advantage in the diurnal changes of photosynthesis rate. The three stems of single stem dry matter accumulation showed logarithmic growth, linear growth, parabolic growth. Aboveground dry matter is distributed at harvest, with leaves accounting for about 50% and stems accounting for 46-56%, with almost equal skin bones. When three Ma reproductive organs accounted for about 4%. When sunlight is strong, the rate of leaf distribution increases. In the range of 1000-2500 蔸, the appropriate increase in density, is conducive to improving the new Ma Yuan fiber yield and quality.