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前言人们要获得棉花高产,必须掌握棉花的生育规律及其特点,使之与外界环境条件统一。近几年来,不少单位在小面积上采用高密度种植、大棵稀植、育苗移栽、杂种优势利用、直言复盖等措施进行高产研究。1977年山东农科院亩产皮棉217斤,徐州地区农科所亩产273斤,为刨高产累积了有益的经验。我们结合教学,也进行了棉花高产栽培研究,1978年亩产皮棉247.5斤。回顾过去,产量高而不稳。高产措施如重复使用,难
Preface To obtain high yield of cotton, we must master the law of cotton’s reproduction and its characteristics so as to make it consistent with the external environmental conditions. In recent years, many units in a small area using high-density planting, planting large trees, transplanted seedlings, heterosis utilization, blunt coverage and other measures for high-yielding research. Shandong Academy of Agricultural Sciences in 1977, 217 pounds of per-mu lint, Xuzhou area of 273 acres of mu produce, planing high-yield accumulated useful experience. We combine teaching, also carried out high-yielding cotton cultivation studies, in 1978 247.5 kg of lint per mu. Looking back, the output is high and unstable. High-yielding measures such as repeated use, difficult