论文部分内容阅读
为研究共生期对再生稻套播油菜性状及产量影响,设置油稻共生期0(T1)、3 d(T2)、5 d(T3)、7 d(T4)和10 d(T5)共5个处理,结果表明:(1)油菜产量和共生期呈一元二次抛物线关系(y=-8.98x~2+93.817x+1 864.6,R~2=0.848),其中共生期为5 d时产量最高,达2 179.8 kg·hm~(-2);(2)油菜全苗期密度随着其与再生稻套播共生期的延长而不断增加,而蕾薹期、盛花期均表现为先增加后减少,苗体稳定后密度大小为T3>T2>T1>T4>T5;(3)共生期与一次有效分枝、分枝有效角果数、全株有效角果数、单株生物量和单株产量呈极显著正相关(p<0.01),与每角粒数和植株密度呈极显著负相关(p<0.01),与主花序有效角果数和千粒重相关不显著(p>0.05)。说明不同再生稻套播油菜共生期通过影响油菜植株密度、单株产量等相关指标进而影响油菜产量,因此适宜的共生期有利于油菜产量的构建。
In order to study the effect of symbiotic period on the traits and yield of ratoon in ratooning rice, a total of 5 (T1), 3 d (T2), 5 d (T3), 7 d (T4) and 10 d The results showed that: (1) The yield and symbiosis of rape showed a quadratic parabola relationship (y = -8.98x ~ 2 + 93.817x + 1864.6, R ~ 2 = 0.848) (2) The seedling density of rapeseed continued to increase with the prolongation of its symbiosis with that of ratooning rice, while the increase at ramification stage and full flowering stage was the first to increase T3> T2> T1> T4> T5. (3) The number of effective pods, effective pods, effective pods, whole plant biomass, There was a significant and significant positive correlation between yield per plant (p <0.01), extremely significant negative correlation with grain number per plant and plant density (p <0.01), no significant correlation with effective pod number and 1000-grain weight of main inflorescences (p> 0.05) . The results showed that the symbiotic period of different ratooning rice intercropping rapeseed affected the rapeseed yield by influencing the plant density and plant yield, so the suitable symbiotic period was conducive to the construction of rapeseed yield.