论文部分内容阅读
研究了播期和种植密度对临优145和临优2018籽粒灌浆特性及粒重的影响。结果表明,播期和种植密度对2个小麦品种灌浆特性及粒重的影响存在差异,但仍符合Logistic生长曲线。不同播期下,临优145的B、Rmax、R2和R3变异较大,临优2018的K、R1、R3、T2和T3变异较大;不同种植密度下2个小麦灌浆参数变异相对较小。灌浆速率对临优145粒重影响较大;中后期灌浆持续时间和渐增期灌浆速率对临优2018的粒重影响较大。在晋南生态条件下,2个供试小麦均以10月9日播种,种植密度225万基本苗·hm-2时粒重较高。
The effects of sowing date and planting density on grain filling characteristics and grain weight of Linyou 145 and Linyou 2018 were studied. The results showed that sowing date and planting density had different effects on grain filling characteristics and grain weight of two wheat cultivars, but still accorded with Logistic growth curve. The variability of B, Rmax, R2 and R3 in Linyou 145 was greater under different sowing dates. The variations of K, R1, R3, T2 and T3 in Linyou 2018 were relatively large. The variation of grain filling parameters of two wheat cultivars with different planting densities was relatively small . The grain filling rate had a great influence on the grain weight of Linyou 145. The grain filling duration of Linfen 2018 and grain filling rate in the increasing stage had a great influence on the grain weight of Linyou 2018 in the middle and later stages. Under the ecological conditions of Jinnan, the two wheat cultivars were all sown on October 9, and the seed weight was higher when the planting density was 2.25 million basic seedlings · hm-2.