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为了夺取小麦高产,必须做到适时收获。根据6年的试验结果,小麦千粒重最高时收获的产量最高。这是因为小麦千粒重达到一定高峰后,叶片及茎秆先后干枯,输导组织破坏,营养物质已无来源,这时籽粒含水量较高,呼吸作用旺盛,如不及时收获,由于呼吸作用,消耗掉一部分储存的干物质,因而收获期越迟,千粒重越低。一般可以根据生理指标及形态指标,来确定最适宜的收获期。一、生理指标: (一)定期测定千粒重:小麦粒重增长从开花后20—25天增长最快,以后渐趋缓慢,每日千粒重
In order to seize wheat high yield, we must achieve timely harvest. According to the results of six years of experiments, the highest grain yield was obtained when the 1000-grain weight was the highest. This is because the thousand-grain weight reaches a certain peak, the leaves and stems have dried up, tissue damage, nutrients have no source, when the grain moisture content, strong respiratory effect, if not timely harvest, due to respiratory effects, consumption A portion of stored dry matter is lost, so the later the harvest, the lower the 1000-grain weight. Generally based on physiological indicators and morphological indicators, to determine the most appropriate harvest period. First, the physiological indicators: (a) regular determination of 1000-grain weight: grain weight growth from 20-25 days after flowering the fastest growth, then gradually slow, 1000-grain weight per day