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首页> 外文期刊>Crop Research >Heat stress effect on flowering and seed yield in delay cropping of canola (Brassica napus, B. rapa and B. juncea).
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Heat stress effect on flowering and seed yield in delay cropping of canola (Brassica napus, B. rapa and B. juncea).

机译：油菜（油菜，甘蓝型油菜和芥菜型油菜）的延迟播种中热胁迫对开花和种子产量的影响。

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摘要

An experiment was conducted in 2006 at the Agricultural Research Station in Esfahan, Iran, to study the effects of heat stress during flowering on the yield and yield components of rape under delayed cropping. The main plot treatments consisted of 2 planting dates (27 September and 11 November, which was the normal and delayed cropping dates, respectively), whereas the subplot treatments consisted of B. napus cultivars (Option 500, Hyola 330, Hyola 401, Sargol and RGS 003 were spring types, and Modena, SLM 046, Opera and Zarfam were the winter types), B. rapa [B. campestris] cultivars (Echo and Park Land) and one B. juncea cultivar (Land Race). The delay in cropping significantly increased MR (main raceme yield as a proportion of total yield) and 1000-seed weight, but reduced SR (success ratio; number of pods produced per flower produced), SF (main raceme seed yield per flower), number of seeds per pod on the main raceme, and seed yield. The cultivar had a more significant effect on MR, SR, SF, number of seeds per pod, weight per 1000 seeds, and seed yield. The values of the agronomic traits were highest for SLM 046, Zarfam and RGS 003. The lowest values of MR and SR were recorded for H-401, Echo, Park Land and Land Race. The lowest SF, number of seeds per pod, weight per 1000 seeds and seed yield were registered for Echo and Park Land. The effects of cropping date and cultivar were most significant on MR, 1000-seed weight and seed yield. The most suitable cultivars for delayed cropping were SLM 046 and RGS 003, which had high values of MR, SR, SF, 1000-seed weight, number of seeds per pod, and number of flowers and pods per plant.
机译：2006年，在伊朗埃斯法罕的农业研究站进行了一项实验，以研究开花期热胁迫对延迟种植下油菜产量和产量构成的影响。主要地块处理包括2个播种日期（分别为9月27日和11月11日，分别是正常播种日期和延迟播种日期），而子地块处理包括甘蓝型油菜（B. napus）品种（选项500，Hyola 330，Hyola 401，Sargol和RGS 003是春季类型，而Modena，SLM 046，Opera和Zarfam是冬季类型），B。rapa [B. campestris]品种（Echo和Park Land）和一个B. juncea品种（Land Race）。播种延迟显着增加了MR（占总产量的总总外消旋体产量）和1000粒重，但降低了SR（成功率;每朵花卉产生的豆荚数），SF（总总外消旋种子产量），主消旋体上每个荚的种子数和种子产量。该品种对MR，SR，SF，每荚的种子数，每1000粒的重量和种子产量具有更显着的影响。 SLM 046，Zarfam和RGS 003的农艺性状值最高。H-401，Echo，Park Land和Land Race的MR和SR值最低。 Echo和Park Land记录了最低的SF，每荚的种子数，每1000颗种子的重量和种子产量。种植日期和品种对MR，1000粒重和种子产量的影响最大。最适合延缓播种的品种是SLM 046和RGS 003，它们的MR，SR，SF，1000种子重量，每荚的种子数以及每株植物的花和荚的值高。

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