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采用“3414”最优回归设计方法,研究定量施肥对甜菜干物质积累与分配规律的影响。结果表明:同一处理在甜菜生育时期叶片、叶柄和整株干物质积累量呈先增加再减少的规律,而块根干物质积累呈一直增加的趋势;叶片干物质分配比率呈下降趋势,而块根干物质分配比率呈上升趋势。氮、磷、钾肥的配合施用明显促进甜菜块根干物质积累量的增加。不施氮、不施磷和不施钾的3个处理平均块根干物质积累量为110.93g/株,与不施肥处理相比平均增长32.33g/株。氮、磷、钾全施的10个处理平均块根干物质积累量则为134.49g/株,与不施肥处理相比平均增长55.89g/株。
The “3414” optimum regression design method was used to study the effects of quantitative fertilization on the regularity of sugarbeet dry matter accumulation and distribution. The results showed that the dry matter accumulation of leaves, petioles and whole plants increased firstly and then decreased in the same treatment during the growth period of sugar beet, while the accumulation of dry matter in root tubers increased all the time. The dry matter partition ratio of leaves showed a downward trend, The distribution of substances is on the rise. The combined application of N, P and K fertilizers significantly increased the dry matter accumulation of beet roots. The average tuber dry matter accumulation of the three treatments without nitrogen application, no phosphorus application and no potassium application was 110.93g / plant, with an average increase of 32.33g / plant compared with no fertilization treatment. The average root dry matter accumulation of 10 treatments of N, P, K was 134.49g / plant, which was 55.89g / plant on average.