棉花促早抗逆栽培技术研究

通过１９９１－１９９３年对山西棉区密度，化控，氮磷钾营养，头水运筹等关键技术的研究结果，提出了以大群体小介体增结第一二节位优质大铃为主要的内容的早发早熟抵抗（避）气候逆境胁迫的促早抗逆栽培理论，形成了以高密化控（密度９．０万～１０．５万株／ｈｍ＾２和ＤＰＣ３－４最佳组合）为核心，配合相应的氮磷钾营养和提早运筹水肥的高产稳产技术体系，连续５年大面积应用，取得显著增产效应（产量达１８００ｋｇ／ｈｍ＾２

A Study on Adverse Resistance Cultural Techniques for Early Maturation in Cotton

The expriments were conducted from 1991 to 1993 to study the effects of key techniques such as planting density, chemical regulation, N, P, K, fertilizers and time of first water irrigation under the stress of weather on the yield and qualities of cotton in Shanxi privince. The results showed that first 1-2 noder and bollforming rate could be increased with planting density. Higher photosynthetic efficiency, good population type and canopy structure with dwarf plant, short sympodia, smaller leaver and bigger bolls could be obtained by chemical regulation. On the bases of higher population density with dwarf plants, chemical regulation, good quality and bigger bolls of on 1-2 nodes increased, early sowing could prevent from the stress of weather Early sowing combined with high population density and chemical regulation and with early water irrigation and fertilizer (N, P, K) dressing produced a high and stable yield. The theory have been applied to practice in large scale for 5 years and gainded significant yield increase, economic, social and ecological benefits.