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近两年,我们在做好小麦田间选穗的基础上,用平均穗重作为初选穗最终弃留的标准,方法简便,收效颇佳。具体做法是:将田间初选穗随机取样剪去穗基部茎秆,称重求得平均穗重,再把天平游码先调到平均穗重的刻度上,然后逐穗测试穗重。凡是小于平均穗重的就淘汰,而等于或大于平均穗重的穗就当选脱粒。这个方法叫做平均穗重决选法,简称穗重法。用穗重法选穗有以下几点好处:一、提高穗选质量:穗粒数与粒重是构成产量两大因素。在相同的栽培条件和同样密度的地块中,准确无误地找出该品种生活力较强的典型麦株,选取经济性状较好的单穗,是复壮种子能够增产的可靠保证,要做到这一点,单凭肉眼的鉴别是很难办到的。在开花或灌浆期,由于不良气候
In the past two years, on the basis of selecting the ear in the wheat field, we used the average ear weight as the standard for the final abandonment of the ear of ear. The method is simple and effective. The specific practice is: Randomly cut the ears of the field primaries ear cut off the base of the stem, weighed to obtain the average weight of spikes, then the balance of the first code transferred to the average weight of the panicle scale, and then panicle test ear weight. Whenever less than the average weight of the panned out, and equal to or greater than the average panicle ear was elected threshing. This method is called the average weight reduction method, referred to as spike weight method. Spike weight election method has the following advantages: First, to improve the quality of ear selection: grain number and grain weight constitute two factors yield. In the same cultivation conditions and the same density of plots, accurately identify the typical wheat varieties with strong viability, selection of a better economic traits of single spike, is a reassuring seed can yield a reliable guarantee, to do This point, naked eye identification is difficult to do. During flowering or filling stage, due to bad weather