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通过对小麦套种玉米吨粮田复合群体干物质积累、光俣性能以及群体冠层的研究表明 :小麦套种玉米带田种植高产形成机理 :一是合理增加了叶面积指数且与作物生物学要求、与当地最佳自然资源相吻合 ;二是改善了群体的通风透光状况 ,表现出良好的边际效应 ;三是群体冠层分布合理 ,光合势高 ,群体光合速率高 ,光合净积累多。进一步提高产量 ,可通过调整作物行比、提早玉米播期、适当推迟小麦播期 ,延长玉米生长期特别是灌浆时间来达到。其初步结论可为麦田套种玉米的增产机理提供理论依据
Through the study of dry matter accumulation, phototrophic properties and population canopy in the compound population of wheat interplanted with corn and grain fields, the results showed that the formation mechanism of high yield of wheat intercropping corn belt was as follows: Firstly, the leaf area index was reasonably increased and was related to crop biological requirements, Which is consistent with the best natural resources in the area; secondly, it improves the ventilation and light conditions of the population and shows a good marginal effect; thirdly, the distribution of the canopy in the population is reasonable, the photosynthetic potential is high, the photosynthetic rate of the population is high, and photosynthetic net accumulates more. Further improve the yield, crop by adjusting the ratio, early sowing of corn, delayed sowing of wheat, to extend the growth period of corn, especially grouting time to achieve. The preliminary conclusions may provide theoretical basis for the wheat yield increase mechanism of interplanting corn