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近年来,我国许多棉区棉花纤维品质下降,特别是成熟系数和拉力下降最为明显,如不引起重视,势必失去竞争能力。为提高棉花品级应采取以下措施: 1 克服带壳采摘的不良习惯。棉铃从裂嘴到完全开裂(铃壳呈平直)需4天左右的时间,而纤维强力(耐拉力)的高峰是在裂嘴后第7天。所以同一块田的棉花,全开后采摘的棉桃,其棉絮纤维细度(m/g)为5300,成熟系数为1 69,强力(g)为4.1;而半开采摘的棉桃,强力为3.9,细度为5600,成熟
In recent years, the cotton fiber quality of many cotton areas in our country has declined, especially the decline of maturity coefficient and tension has been the most obvious. If we do not pay enough attention, we will inevitably lose the competitive ability. To improve cotton grade should take the following measures: 1 to overcome the poor habits of picking with shell. Cotton boll from cracking mouth to complete cracking (bell-shell was straight) takes about 4 days, while the fiber strength (resistance to tension) peak is in the first 7 days after ripping. Therefore, cotton in the same field and cottonseed picked after the full opening had fineness (m / g) of 5300, a maturity coefficient of 1 69 and a strength (g) of 4.1, while the semi-harvested cotton bolls were 3.9 , Fineness of 5600, mature