Cotton picking has knowledge, careful picking and high returns.

I. Cotton picking should be timely.

Cotton picking is the last link of cotton production, and it is the key to ensure high yield and high efficiency. As cotton is an infinite inflorescence crop, it has budding, flowering, boll setting and maturity, so it needs to be harvested many times. Therefore, according to the cotton boll mature in the cracking process to complete the third stage of fiber development, that is, the fiber dehydration period, about 7 days. The water content of cotton boll shell decreased from 80% to 30%, the water content of cotton pulp decreased from 57% to 18%, the fiber was further dehydrated and matured, and the fiber strength continued to increase due to the deposition of cellulose. Therefore, the fiber strength of cotton boll in 6-8 days is the highest, the maturity is good, the fiber is turned more, the color and lustre of cotton boll is high, and the yield is high.

Second, pay attention to the rush to harvest cotton during the period of continuous rain and overcast

The cotton picking period takes a long time, about 2 months, in the opening and picking period, if the sun is sufficient, the temperature is high, the humidity is low, the cotton is opened quickly and smoothly; on the contrary, in case of long-term low temperature and continuous rain, the cotton boll can not crack normally, and the picking period is prolonged, resulting in picking difficulties, moldy cotton bolls, reduced cotton fiber quality, reduced yield and reduced yield. Therefore, according to the experience of cotton growth characteristics and high-yield and high-quality cultivation techniques, in addition to adopting stress-resistant and early cultivation management, and striving to stagger the picking period and rainy weather, it is necessary to grab sunny days, rainy days, that is, quick picking in sunny days and rainy days, in case of long-term rainy years, the temperature is on the low side, cotton bolls crack slowly or can not open bolls normally, old mature cotton peaches should be picked, which can be heated and dried indoors to promote ripening and opening bolls.

Third, do not mix "three strands" when picking cotton

"three filaments" (also known as heterosexual fiber) refers to the general name of foreign soft substances such as colored fiber, agricultural film, hair and down. Because cotton is mixed with "three strands" in the process of picking, drying, storage and processing, and then through the process of gin from long to short filaments, from large to small particles, these filaments and particles go through multiple spinning processes, and then become finer and finer particles. Spinning and weaving with cotton containing "filaments and particles" will produce defects, which will greatly affect the spinning quality. Therefore, it is necessary to strictly control the blending of "three strands".

Fourth, how to prevent the "three strands" from mixing into cotton

The source of "three filaments" is a series of production operations, such as picking, drying, processing, packaging and storage. Therefore, quality control from the source of seed cotton pollution is fundamental to improve the quality of raw cotton. First, to publicize cotton farmers' awareness of the harm of "three filaments"; second, not to use chemical fiber bags when picking cotton, but to use cotton cloth bags to collect cotton. When drying cotton, brackets and cotton cloth should be used to prevent flowers from being mixed with "three strands" on the ground or on the road; third, separate storage control, which must be stored only at home, strictly separated from livestock and poultry; fourth, when picking and drying, people should wear hats to prevent mixing with hair, and at the same time advocate family picking and sorting, once found, pick out and deal with; fifth, processing and acquisition enterprises to take control measures.