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棉种播种后的发芽生长,和出土棉株的生长发育,均需要一定的温度、水分和空气等条件。在生产实践中,不论在确定适宜的棉花播种期或观察它的生长发育,温度都具有主要的作用。为了探求不同棉花品种对播种出苗和生长发育所需要的温度条件,我们于1959年在三原选用当地播种较广和准备推广的良种517号、53—183号与岱字15号等三个品种进行试验,以图探讨泾惠渠灌区适宜的棉花播种期。試验采用田间分期播种法,由3月31日起每隔5日播种一期,至4月25日结束,共播种6期,每期每品种重复一次,顺序排列,小区长19尺,宽12.6尺,小区面积为0.0399亩;田间采用宽窄行种植,宽行3尺,窄行1.2尺,每亩密度517号为4200株,53—183号为3900
Cotton sowing after germination and growth, and unearthed cotton plant growth and development, all need some temperature, moisture and air and other conditions. In production practice, temperature plays a major role in determining the appropriate cotton seeding period or observing its growth and development. In order to explore different cotton varieties on the sowing seedlings and growth and development of the required temperature conditions, we selected in the original in 1959 in Sanyuan wider planting and ready to promote varieties 517, 53-183 and Dai word 15 and other three varieties Experiment, in order to explore the suitable cotton sowing period in Jinghuiqu irrigation area. The trial adopted the field staging sowing method, sowing one period every 5 days from March 31 to the end of April 25, sowing a total of 6 periods, each species repeated once, in order, the district is 19 feet long and 12.6 wide. Feet, the plot area of 0.0399 acres; field with wide and narrow lines of planting, wide-line 3 feet, narrow line of 1.2 feet per mu density 517 to 4200, 53-183 to 3900