播种期对晋北地区盐碱地高粱生长发育及产量的影响

Effects of Sowing Date on the Growth and Yield of Sorghum in Saline Land of North Region in Shanxi Province

为了探寻晋北盐碱地高粱的适宜播种期,以"龙杂5号"和"龙杂9号"为试验材料,研究了播种期对高粱生长发育及产量形成的影响。结果表明,随着播种期的推迟,两个高粱品种播种-出苗、出苗-抽穗的日数减少,生育期明显缩短;株高、穗长无显著变化;茎粗和叶片SPAD值以5月11日播种处理最高。两个高粱品种的产量皆以5月11日播种处理最高,"龙杂9号"的丰产性较好。因此,5月中旬可作为晋北盐碱地高粱的适宜播种期。

In order to search for the suitable sowing date of sorghum in saline land in northern Shanxi, a field experiment was conducted with two sorghum hybrids to study the effect of different sowing date on the growth and yield formation of sorghum. The results showed that, with the delay of sowing date, the days from sowing to emergence, the days from emergence to heading and the growth period of two sorghum hybrids were significantly shortened;plant height and panicle length had no significant changed. Amo May 11 had the largest stem diameter and SPAD value. The higher,which ＇Longza9＇ sorghum hybrid had the highest saline land in northern Shanxi is during mid-May. ng the test sowing dates, two sorghum hybrids sowed on yields of two sorghum hybrids sowed on May 11 were all yield. Therefore, the suitable sowing date of sorghum in