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以辽豆21为试材,设3个密度水平(15万,18万,21万株·hm-2)及4种植株配置方式(1,2,3,4株·穴-1),研究各因素对大豆主要农艺性状和生理性状的影响。结果表明:大豆穴播方式(≥2株·穴-1)可以显著提高大豆出苗率;植株配置相同条件下,随种植密度的增加,植株株高、节间长度和结荚高度均显著增加,分枝数则逐渐减小,且叶面积指数峰值出现时间提前;相同密度条件下,随每穴株数的增加,株高和节间长度均呈下降趋势,结荚高度显著增加,分枝数则先增加后下降;同一时期,随每穴株数的增加,叶面积指数逐渐增大,植株配置对生物产量积累量的影响较小;不同处理大豆各器官所占比例的趋势一致,即:籽粒>茎秆≥叶片>叶柄>荚皮。在适宜密度下,适当增加每穴株数,有利于形成合理的群体结构。
Taking Liaozu 21 as test material, three density levels (150,000, 180,000 and 210,000 plants · hm-2) and four plant types (1, 2, 3 and 4 plants · cave- Effects of Various Factors on Main Agronomic and Physiological Characteristics of. The results showed that: the soybean planting mode (≥2 strains · acupoint-1) could significantly increase the emergence rate of soybean seedlings. Under the same conditions, the plant height, internode length and pod height increased significantly with the planting densities increasing. The number of branches decreased gradually and the peak time of leaf area index appeared ahead of time. Under the same density, the plant height and internode length decreased with the number of plants per hole, and the height of pod increased significantly. Increase and then decrease; the same time, with the number of each hole increased, the leaf area index increased gradually, plant configuration on the impact of the smaller the amount of biomass accumulation; the proportion of different organs of soybean processing the same trend, namely: Culms ≥ leaves> petiole> Pod. Appropriate density, the appropriate number of holes per hole, is conducive to the formation of a reasonable population structure.