| To find out physiological basis of regulation and control of winter wheat yield by different row spacing configuration, and to provide the theoretical basis for wide-seeding and high-yielding cultivation, a high-yielding winter wheat cultivar Taishan 28 was selected as material. Using the split area design, the main area for the planting density was set up with three levels, 150×104 plants·hm-2, 225×104 plants·hm-2 and 300×104 plants·hm-2, respectively. The sub-area for planting spacing was set up with three levels, 25 cm, 20 cm and 15 cm, respectively. Under the conditions that the basic seedling is 150×104 plants·hm-2, due to the low planting density, both dry matter accumulation and yield of winter wheat was lower. When the basic seedling was increased to 225 ×104 plants·hm-2, with the row spacing of 20 cm and 25 cm and 300 ×104 plants·hm-2, with the row spacing of 25 cm, the dry matter accumulation and yield reach a high level. Under the basic seedling rate of 225×104 plants·hm-2, with row spacing of 20 cm, the translocation of assimilation from the vegetative organs to grain before anthesis stage was increased. The accumulation of dry matter in grains after anthesis and the contribution rate of grain were significantly higher than those under other treatment. Under the conditions with the basic seedling rate of 225 ×104 plants·hm-2, the line space of 20 or 25 cm, and the basic seedling of 300 ×104 plants·hm-2, the line space of 25 cm, Taishan 28 can achieve higher yield. Therefore, the reasonable planting density and row spacing configuration are important technical ways to realize the high yield of wheat. |
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