棉花全苗、壮苗是高产的基础,而优良的种籽则是保证苗全、苗壮的内在根据,为实现一播全苗,必须十分重视提高种籽质量。高质量的种籽,不仅要具有优良的种性,而且还必须有良好的种籽素质。陆地棉的籽指,一般要求10克左右,发芽率至少要达到85％以上,纯度99.5％。陆地棉种籽外形,通常为圆锥形或卵圆形,一头较钝为合点端,一头较尖为珠孔端,是棉籽萌发通气吸水的主要通道。成熟的棉籽,包括种皮、胚及胚乳遗迹三部份。陆地棉一般都为毛籽,在种皮外还附有短 Cotton seedlings, strong seedling is the basis of high yield, and good seed is to ensure that the whole seedlings, seedlings strong internal basis, in order to achieve a broadcast seedlings, we must attach great importance to improve seed quality. High-quality seeds, not only to have good species, but also must have good seed quality. Upland cotton seed refers to the general requirements of about 10 grams, germination rate of at least 85%, purity 99.5%. Upland cotton seed shape, usually conical or oval, a relatively dull for the point of the end of a more sharp tip for the bead, is the main channel of cottonseed germination ventilation and water absorption. Mature cottonseed, including the seed coat, embryo and endosperm ruins in three parts. Upland cotton are generally hair seeds, in addition to the seed coat with short