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选用耐密玉米品种郑单958为材料,设置大垄深耕整秆深还田地膜覆盖(处理1)、大垄深耕地膜覆盖(处理2)、大垄无深耕无整秆深还田无地膜覆盖(对照)3个处理,探讨对耐密玉米的株高、叶片数、单株干物质积累、叶片叶绿素含量及产量的影响。结果表明,处理1、处理2与对照相比,株高差异不明显;拔节期、抽穗期、灌浆期单株叶面积、干物质积累、叶绿素含量及产量均有增加,且处理1高于处理2。与对照相比,处理1拔节期株高明显增高,抽穗期至灌浆期叶面积增加12.5%,拔节期至抽穗期单株干物质积累增加168%,灌浆期叶片叶绿素含量增加14.4%,产量增加12.3%。处理1为耐密玉米健壮生长提供了良好的土壤环境,在适宜密度及叶面积生长条件下,玉米个体生长健壮,群体结构合理,干物质积累增加,植株的源流库呈现出源足、流畅、库满态势,增加了耐密玉米的穗行数、穗粒数及穗粒重,从而增加了产量。
Selection of close-tolerant maize variety Zhengdan 958 as the material, set up a large ridge deep plowing entire straw deep field film mulching (Treatment 1), large ridge deep plowing mulching (Treatment 2) (Control). The effects of three treatments on plant height, number of leaves, dry matter accumulation per plant, chlorophyll content and yield of resistant maize were investigated. The results showed that there was no significant difference in plant height between treatments 1 and 2 and CK. The leaf area, dry matter accumulation, chlorophyll content and yield of all treatments at jointing stage, heading stage and filling stage were increased, and treatment 1 was higher than treatment 2. Compared with the control, the plant height at treatment 1 was significantly increased, the leaf area increased by 12.5% from heading to grain filling stage, the dry matter accumulation at jointing stage to heading stage increased 168%, and the chlorophyll content at grain filling stage increased 14.4% 12.3%. Treatment 1 provided a good soil environment for vigorous growth of dense maize. Under appropriate density and leaf area growth conditions, maize individuals grew robustly, the population structure was reasonable and the accumulation of dry matter increased. Full state of the library, increasing the number of rows of resistant ears of dense grains, grains per spike and grain weight, thereby increasing the yield.