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一、目的掌握好闷种催芽的适宜程度,是实现棉花一播全苗的重要环节之一。一般掌握催芽“火候”的提法是:少量种子刚露芝麻芽,大部种子顶门不露芽。但是这一标准实际很难掌握。一因棉种保持“芝麻芽”的时间很短,露芽后随即继续伸长;二因“顶门不露芽”的种子很难观察,必须摘除短绒,甚至要剥开外种皮才能看到,检查比较费工。所以,不少地方以比较易于观察的发芽率作为掌握催芽程度的标准。发芽率掌握在什么程度为宜,各地提法颇不一致,有待研究明确。
First, the purpose of mastering the graceful stuffing sprouting appropriate level, is one of the important parts of cotton seedlings to achieve a broadcast. Generally grasp the germination of “heat” reference is: a few seeds just exposed sesame seeds, most of the top seeds do not show buds. However, this standard is actually difficult to grasp. One because of the cotton seed to maintain “sesame seed buds” for a very short period of time, immediately after the elongation of buds continue to stretch; two because the “roof does not bud” seed is difficult to observe, you must remove the plush, or even peel the seed coat to see Check more labor. Therefore, many places with more easily observed germination rate as the standard to grasp the degree of germination. Germination rate to what extent is appropriate, the formulation is quite inconsistent throughout the pending study to be clear.