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| 试验以西成薯007为试验材料，研究了K肥施量与秋甘薯产量之间的关系，得出以下结论：施K有利于提高秋甘薯植株的同化能力，在一定程度上抑制茎叶徒长，增加干物质积累。施K肥能增强地上部同化产物向地下块根运输的能力，从而降低T/R值，提高经济产量。块根干率和茎粗是由甘薯品种特性决定的，施K与否与其影响不大。低K能提高秋甘薯的大中薯率，增加秋甘薯的最长茎长和基部分枝数。而施K后其干物率较不施肥下降大。只施N和P的叶绿素含量高于施K处理，同时均显著高于不施肥。秋甘薯在低K水平土壤下的最佳施肥量在16.87~21.44Kg/亩，在此施肥量下可获得高的鲜薯产量、薯干产量和淀粉产量。虽然使用K肥能有效提高其生物产量和块根产量，但其对薯干的贡献在低K和高K水平是没有差异的。 |
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wenzonglu
木虫 (正式写手)
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【答案】应助回帖
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更正上贴： Relationship between K fertilizer and sweet potato yield was studied by Xichen Potato 007. The results were showed as followings. K fertilizer improved the assimilative capacity of the sweet potato, and increased the dry matter accumulation while it partly inhibited excessive growth of the stems and leaves. The ability of transporting assimilate to underground tuber was enhanced by K fertilizer, resulting in reducing the value of T/R and increasing economic production. Root dry rate and stem diameter is determined by the sweet potato species characteristics instead of K fertilizer amount. The low K fertilizer amount increased the rate of large and medium-sized potato in sweet potato, and increase the longest stem length and the number of base branches. The rate of dry matter was decreased by applied K fertilization comparing to control. Chlorophyll content of plants treated with N and P fertilizer was higher than those of K fertilizer treatment and non-fertilization. The best amount of K fertilizer was 16.87~21.44 kg/mu in the low K level soil, which increased fresh yield, dry yield, and starch yield. There was no difference between low K and high K levels for dry matter production although K fertilizer can effectively improve its biomass yield and root tuber yield. |
3楼2012-10-14 11:01:23
wenzonglu
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tianlus1632: 金币+100, 翻译EPI+1, ★★★★★最佳答案, 谢谢了 2012-10-14 11:34:36
tianlus1632: 金币+100, 翻译EPI+1, ★★★★★最佳答案, 谢谢了 2012-10-14 11:34:36
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Relationship between K fertilizer and sweet potato yield was studied by Xichen Potato 007. The results were showed as followings. K fertilizer improved the assimilative capacity of the sweet potato, and increased the dry matter accumulation while it partly inhibited excessive growth of the stems and leaves. The ability of transporting assimilate to underground tuber was enhanced by K fertilizer, resulting in reducing the value of T/R and increasing economic production. Root dry rate and stem diameter is determined by the sweet potato species characteristics instead of K fertilizer amount. The rate of large and medium-sized potato was increased by low K fertilizer amount, and The low K fertilizer amount increased the rate of large and medium-sized potato in sweet potato, and increase the longest stem length and the number of base branches. The rate of dry matter was decreased by applied K fertilization comparing to control. Chlorophyll content of plants treated with N and P fertilizer was higher than those of K fertilizer treatment and non-fertilization. The best amount of K fertilizer was 16.87~21.44 kg/mu in the low K level soil, which increased fresh yield, dry yield, and starch yield. There was no difference between low K and high K levels for dry matter production although K fertilizer can effectively improve its biomass yield and root tuber yield. |
2楼2012-10-14 10:58:55
wenzonglu
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4楼2012-10-14 11:03:20
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