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决定粒数的时期当小麦的穗子从旗叶中抽出来的时候,它已完或了一系列外表上看不见的内部分化,称为幼穗分化过程。每亩穗数、每穗粒数和千粒重是冬小麦产量的三个构成因素。冬小麦的幼穗分化过程包括一系列内部穗分化阶段,是决定粒数多少的关键时期。如果它持续时间较长,分化出的小穗和小花数目较多,则每穗粒数也较多。反之,这段时间持续较短,则结实粒数较少。实践表明,穗分化阶段的出现日期和持续天数对粒数有一定的影响,穗分化过程又受环境条件的制约。
The period when grain is determined When wheat’s ears are extracted from the flag leaves, it has completed or developed a series of seemingly invisible internal divisions called spike differentiation. The number of spikes per acre, the number of grains per spike, and the 1000-grain weight are the three components of winter wheat yield. The process of panicle spike differentiation in winter wheat includes a series of stages of internal spike differentiation, which is the crucial period for determining the number of grains. If it lasts longer and the number of spikelets and florets differentiated is greater, the number of grains per spike is greater. Conversely, this period of time continued to be shorter, then the grain number is less. Practice shows that the emergence date and duration of spike differentiation stage have a certain impact on the number of grains, and the spike differentiation process is constrained by environmental conditions.