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棉花种子与禾谷类不同,它具有种皮厚、被短绒、胚茎软、吸水慢、拱土力弱等特点。因此,必须创造与之相适应的环境条件,才能一次播种保全苗。除注意掌握播种的一般环节外,要特别做到“四忌”。一忌土壤水分过多或过少.水分是棉籽发芽出苗的保证。但土壤水分过多会导致烂籽、烂芽;水分过少则出苗缓慢,发芽后易芽干。据试验,播种的棉田土壤水分以16—18％为最好。超过18％,要开沟晾墒增温,然后再播种;低于15％,则需添墒后再播种。
Cotton seeds and cereals are different, it has a thick seed coat, was flocking, embryo stem soft, slow water absorption, weak arch soil strength and so on. Therefore, we must create the appropriate environmental conditions in order to sow the seedlings. In addition to pay attention to grasp the general aspects of sowing, to be particularly “four bogey.” Avoid soil moisture too much or too little. Moisture is the guarantee of seedling emergence. However, excessive soil moisture can lead to rotten seeds and rotten buds. When the amount of water is too low, the seedlings are sprouted out slowly and easily dry after germination. According to the test, sowing cotton soil moisture to 16-18% is best. More than 18%, to ditch dry moisture warming, and then sowing; less than 15%, you need to sow before sowing.