棉花高产栽培技术

一、选择优良品种根据土质,选择高产抗病的抗虫棉品种。砂壤土地块,一般选择株型紧凑的中早熟品种,如冀岱99B、国审668、丝光棉2号。黏壤土地块,既可选择株型紧凑的也可以选择株型稍松散中熟品种,如邯284、丝光棉1号、中棉所41等。     

丝光棉pH调控研究

研究用醋酸/醋酸钠的酸性缓冲溶液调控丝光棉pH.主要研究不同处理温度、处理时间、缓冲溶液pH对丝光棉pH的调控作用,同时研究了超声波对调控作用的影响,以及pH调控处理后的丝光棉力学性能的变化.实验表明:丝光棉的pH值可调到4～7.5.缓冲液pH越低,处理时间越长,处理温度越高,丝光棉的pH降低越快越低;超声波对丝光棉pH调控具有加速的作用.使用低pH的缓冲溶液,丝光棉的力学性能不会受到损害反而会得到加强.

Abstract：

The buffer solution of sodium acetate & acetic acid deal was used to regulate the pH of mercer-ized cotton. The regulation role of treatment temperature, treatment time and pH of the HAc/NaAc solu-tion for the mercerized cotton was studied and the effect of ultrasound on the regulation process was inves-tigated. After the pH control, the change of strength of the mercerized cotton was tested. The results in-dicated that pH in the range of 4-7.5 was suitable for mercerized cotton. With lower pH of HAc/NaAc solution,longer processing time and higher temperature, the pH of mercerized cotton dropped quicker and lower. Ultrasound showed an accelerating effect for decreasing the pH of mercerized cotton. Using a buff-er solution of low pH did not affect the mechanical properties of the mercerized cotton; instead, it im-proved them.