| 罗 璇，罗兴录，王 战，等.不同施钾量对木薯产量和淀粉积累的影响研究[J].广东农业科学,2015,42(7):-11 |
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不同施钾量对木薯产量和淀粉积累的影响研究 |
| Effects of different potassium levels on Cassava yield and starch accumulation |
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| DOI： |
| 中文关键词: ：木薯 施钾量 产量 淀粉积累 |
| 英文关键词: Cassava potassium application rate yield starch accumulation |
| 基金项目: |
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| 摘要点击次数: 1979 |
| 全文下载次数: 1107 |
| 中文摘要: |
| ：以木薯品种新选048为材料，分别在块根形成期、块根膨大前期、块根膨大中期和工艺成熟期对不
同施钾处理的木薯块根产量、淀粉含量、块根性状、净光合速率、株高、茎粗、各器官蔗糖含量和全钾含量等进
行测定。结果表明：苗期施钾肥不仅能促进木薯块根发育期茎叶生长，提高中后期净光合速率和块根淀粉积累速
率，同时还可有效提高木薯块根、茎秆、叶片全钾含量。同时随着施钾量的增加，木薯块根产量、淀粉含量及淀粉
产量也均逐渐增加，其中K2O…450…kg/hm2
处理木薯块根产量、淀粉含量及淀粉产量最高，与空白对照相比，其木
薯块根产量增加63.91%，淀粉含量增加9.49%，淀粉产量增加79.46%。可见，增施钾肥是提高木薯产量和淀粉产
量的有效措施，施用量以K2O…450…kg/hm2
为宜。 |
| 英文摘要: |
| Field experiments were conducted with Xin Xuan 048 in tuber formation，early-bulging，middle-bulging
and technical maturity stage in 2013 to study the change of root yield，starch content，root traits，net photosynthetic
rate，plant height，stem diameter，sucrose content and total potassium content in different organs of Cassava under the
condition. The results indicated that Cassava starch content，starch yield and root yield significantly improved under the
K1 treatment. Compared with the control without K addition，starch content increased by 9.49%，starch yield increased
by 79.46%，and the root yield increased by 63.91%. When K2O application was 150 kg/hm2-450，the Cassava root yield，
starch content and starch yield increased with the quantity of K increasing. Potassium fertilizer application at seedling
stage could not only promote the growth of stems and leaves at early stage，increase net photosynthetic rate，but also
improve the total potassium content of Cassava tuber and the filling rate of starch at the middle filling stage. Obviously，
under the condition of moderate fertility soil，increasing potassium fertilizer application was an effective measure to
improve the yield and starch content of Cassava. |
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