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本文用土柱栽培研究了土层厚度对旱地小麦花后根系干重及产量的影响 ,结果表明 :土层厚有利于旱地小麦根系生长 ,根系分布于表层的比例少。土层愈薄 ,籽粒产量中来自开花前贮藏器官物质运转的量所占的比例就愈高 ,产量愈低。由于处理 3(16 0cm)与处理 4(对照 ,2 0 0cm)差异不显著 ,处理 1(80cm)、2 (12 0cm)、2 (12 0cm)与处理 4(对照 )差异显著 ,因此可以认为旱地小麦获得高产的土层厚度下限指标应在 16 0cm左右 ,并可据此制定管理方案 ,以获得高产高效。
In this paper, soil thickness was used to study the effect of soil thickness on the dry weight and yield of dry land wheat after flowering. The results showed that soil thickness was beneficial to the growth of wheat roots in dryland and the root distribution was less in the surface layer. The thinner the soil, the higher the proportion of the grain yield coming from the storage organ function before flowering and the lower the yield. Since treatments 1 (80 cm), 2 (120 cm), 2 (120 cm) and treatment 4 (control) did not differ significantly between treatments 3 (160 cm) and 4 (control, 200 cm) Dryland wheat to obtain high yield of soil thickness of the lower limit indicator should be about 16 0cm, and management plan can be formulated accordingly to obtain high yield and high efficiency.