定量施肥对甜菜干物质积累与分配的影响
Crops(2012)
Abstract
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。
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Key words
Top-root ration,Sugarbeet,Quantitative fertilization,Dry matter
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