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为了给冬小麦水氮管理提供理论依据,以京冬8号为试验材料,采用随机区组设计,研究了4种水氮模式处理下冬小麦冠层结构的差异。结果表明,与传统水肥相比,传统灌溉-优化施肥的冬小麦株型较紧凑,植株高度相近,基部节间缩短,上3叶变短、变厚,总面积减少11.6%,叶倾角大,各层透光率高;优化灌溉-传统施肥的冬小麦株型松散,植株高度增加,基部节间差异小,上3叶变长、变薄,总面积增加14.1%,叶倾角小,各层透光率低;优化水肥与秸秆还田优化水肥株型稍松散,高度有所增加,基部节间缩短,上3叶长度有所增加,宽度有所减少,总面积分别减少2.3%和1.7%,叶倾角略减小,各层透光率略下降。与优化水肥相比,秸秆还田优化水肥有利于改善冬小麦冠层结构和光分布,但效果不明显。
In order to provide a theoretical basis for water and nitrogen management of winter wheat, we studied the canopy structure of winter wheat under four water and nitrogen treatments using Jingdong 8 as experimental material and randomized block design. The results showed that compared with traditional water and fertilizers, the traditional irrigation and optimized fertilization of winter wheat plants were more compact with similar plant height, shortened basal internodes, shortened and thickened upper third leaves, decreased total area by 11.6% and large leaf inclination, The results showed that there was a high light transmittance in the layer of winter wheat with optimal irrigation and conventional fertilization. The plant height was increased and the difference in basal internodes was small. The upper 3 leaves became longer and thinner, the total area increased by 14.1% Optimized water and straw and straw to optimize the type of fertilizer was slightly loose, highly increased, the base of the internodes shortened, the upper three leaves increased in length, width decreased, the total area decreased by 2.3% and 1.7%, respectively, leaves Tilt slightly reduced, the light transmittance slightly decreased. Compared with the optimized water and fertilizer, straw returning to field to optimize the water and fertilizer was beneficial to improve the canopy structure and light distribution of winter wheat, but the effect was not obvious.