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通过深松和播期对玉米冠层结构的调控,分析深松与旋耕条件下不同播期群体冠层结构特点,明确塑造高产群体冠层结构的耕作方式及适宜播期。采用裂区设计,主区耕法设2个水平(深松与旋耕),副区播期设3个水平(4月25日、5月10日和5月25日),研究深松与不同播期对玉米冠层结构及产量性状的影响。结果表明,深松可适当延长玉米生育进程,对玉米植株形态、叶面积指数(LAI)、群体光合势(LAD)、干物质积累特征参数及产量的影响均表现为深松>旋耕(CK);播期处理间其冠层结构、产量及产量构成因素存在显著差异,表现为早播>中播>晚播;随着播期推迟,早播(4月25日)产量较5月10日、5月25日分别提高3.61%和43.38%。说明深松条件下早播利于群体形成合理的冠层结构,可有效提高玉米产量。
Through the regulation of corn canopy structure through subsoiling and sowing date, the canopy structure characteristics of different sowing date under deep pine and rotary tillage were analyzed. The canopy pattern and suitable sowing date for shaping canopy structure of high-yielding population were clarified. Using split-zone design, the main area of tillage was set at 2 levels (subsoiling and rotary tillage) and the sowing stage at the sub-area was set at 3 levels (April 25, May 10 and May 25) Effect of Different Sowing Date on Structure and Yield Traits of Corn Canopy. The results showed that subsoiling could extend the process of maize growth appropriately. The effects on plant morphology, leaf area index (LAI), population photosynthetic potential (LAD), dry matter accumulation characteristic parameters and yield of maize were as follows: ); Sowing date of its canopy structure, yield and yield components of significant differences exist, as early sowing> sowing> late sowing; with the sowing date, early sowing (April 25) than May 10 Day, May 25 increased 3.61% and 43.38%. It shows that the early sowing under subsoiling conditions can benefit the population to form a reasonable canopy structure, which can effectively increase the corn yield.