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“早发、稳长、不早衰”是我省棉花丰产栽培的技术要求。但因我省春夏多雨,肥水难控,部分棉田常常发生徒长,蕾铃脱落,产量不高。常年徒长棉田面积达数十万亩。以往控制徒长多采用中耕伤根的办法,但常导致棉株早衰、六十年代初曾研究用矮壮素控制棉株徒长,收到一定效果,但又带来铃壳加厚、吐絮不畅、棉绒变短且易断裂等问题;同时,由于有效浓度与有害浓度的间距较窄,在生产上不易掌握,因而未能广泛推广。 1980年经农业部批准,我们与西德巴斯夫(BASF)公司合作研究PIX控制棉花徒长技术,试验期间得到北京农业大学和沈阳化工研究院的热情帮助。1981—1982年,我
“Early onset, stable, not premature aging” is our province cotton high yield cultivation technical requirements. However, due to rainy spring and summer in our province, fertile water is difficult to control, some cotton fields often occur leggy, buds fall off, yield is not high. Perennial growth of cotton fields amounted to hundreds of thousands of acres. In the past, many people used the method of cultivation and root injury, but they often led to premature aging in cotton plants. In the early 1960s, they studied the use of CCC to control the growth of cotton plants and received some results. , Lint shorter and easy to fracture and other issues; the same time, due to the concentration of effective concentration and harmful concentrations of narrow, difficult to grasp in the production, which failed to widely promote. With the approval of the Ministry of Agriculture in 1980, we cooperated with BASF to study the technology of PIX control of cotton leggy. During the experiment, we got the warm support from Beijing Agricultural University and Shenyang Chemical Research Institute. 1981-1982, me