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为给旱作春小麦高产栽培提供试验依据,分别对赤峰、呼盟两地区旱作春小麦叶面积指数和光合势发展动态及其影响因素进行了系统的研究。结果表明,不同地区,春小麦适宜的叶面积指数及光合势不同,但全生育期叶面积指数和光合势均呈单峰曲线变化,峰值出现时间因地区而异,且因不同密度、施肥量处理,叶面积指数和光合势存在明显的差异。生育后期叶面积指数和光合势与产量呈显著正相关,故保持孕穗期后较高的叶面积指数和光合势,才能获得较高的经济产量。
In order to provide experimental basis for spring wheat high yield cultivation in dry land, the leaf area index and photosynthetic potential dynamics of dry-land spring wheat in Chifeng and Hulime were systematically studied. The results showed that the suitable leaf area index and photosynthetic potential of spring wheat were different in different regions, but the leaf area index and photosynthetic potential of spring wheat showed single peak curve, the peak appearance time varied with different regions and different density and fertilization , Leaf area index and photosynthetic potential were significantly different. Leaf area index and photosynthetic potential were significantly and positively correlated with grain yield at late growth stage. Therefore, higher leaf area index and photosynthetic potential after booting stage maintained a higher economic yield.