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以密植品种郑单958和稀植品种丹玉39为试材,通过不同土壤量的盆栽试验来模拟不同的土壤生态容量,研究不同耐密植玉米品种生长发育所需的土壤生态容量以及土壤生态容量对玉米植株形态、光合特性和产量的影响。结果表明,随着土壤生态容量的增加,玉米株高、茎周长、叶面积、穗位叶光合速率、单株子粒重以及百粒重均呈上升趋势,说明土壤生态容量是玉米生长发育和产量形成的限制性因子。不同耐密植型品种对土壤生态容量的响应不同,12.5 kg土量处理的土壤生态容量可以满足耐密植型玉米品种郑单958的产量需求,郑单958的自我调控机制强,可以更好地适应较低的土壤生态容量,可能是其耐密植的主要原因之一。
With the close planting Zhengdan 958 and the sparsely poplar variety Danyu 39 as test materials, different soil ecological capacities were simulated by different soil pot experiments to study the ecological capacity of soils and soil ecological capacity Effects on Plant Morphology, Photosynthetic Characteristics and Yield of Maize. The results showed that the plant height, stem circumference, leaf area, photosynthetic rate per plant, grain weight per plant and 100-grain weight of maize increased with the increase of soil ecological capacity, indicating that soil ecological capacity is the growth and development of maize Yield Constraints. The response of different density tolerant plants to soil ecological capacity was different. The soil ecological capacity of 12.5 kg soil treatment could meet the yield demand of the close-tolerant corn variety Zhengdan 958. Zhengdan 958 had a strong self-regulation mechanism and could better adapt to Lower soil ecological capacity may be one of the main reasons for its close tolerance.