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2014年在辽宁省农业科学院高粱试验田,通过不同密度处理(60 000、75 000、90 000、105 000、120 000株/hm~2),分析高产高粱品种辽杂19群体子粒灌浆特征及其与产量的关系。结果表明,随密度增加,产量先增加后降低,表现单峰曲线变化趋势。在中密度(90 000株/hm~2)条件下群体产量显著高于低密度(60 000株/hm~2)、高密度(105 000株/hm~2)和超高密度(120 000株/hm~2)群体。各密度处理高粱群体子粒灌浆过程均可用Logistic方程拟合。中密度高粱群体子粒平均灌浆速率(G)、最大灌浆速率(G_(max))显著高于低密度、超高密度群体。不同密度高粱群体子粒活跃灌浆期(D)差异达显著水平。相关和逐步回归分析表明,群体子粒灌浆速率是影响高粱产量的主要因素;群体线性灌浆期的灌浆速率(P_2)对产量的影响最大,因此提高P_2可能是增产的关键。
In 2014, the grain filling characteristics of high yielding sorghum variety Liaozha19 and its correlation with the grain filling rate of high yielding sorghum (Sorghum bicolor L.) were analyzed by different density treatments (60 000, 75 000, 90 000, 105 000 and 120 000 plants / hm 2) The relationship between output. The results showed that with the increase of density, the yield first increased and then decreased, showing a single peak curve trend. Under moderate density (90 000 plants / hm ~ 2), the yield of population was significantly higher than that of low density (60 000 plants / hm 2), high density (105 000 plants / hm 2) and ultra high density / hm ~ 2) population. Logistic equation can be fitted to the grain filling process of each density-treated sorghum population. The average grain filling rate (G) and maximum filling rate (G_ (max)) of medium density sorghum population were significantly higher than those of low density and ultra high density population. The grain filling frequency (D) of sorghum population with different density reached a significant level. Correlation and stepwise regression analysis showed that the population filling rate was the main factor affecting sorghum yield. The effect of grain filling rate (P 2) at the linear filling stage on the yield was most significant. Therefore, increasing P 2 may be the key to yield increase.