| 韦冬萍1，岑忠用2，韦剑锋１，陈 涛3，胡江如１.施氮量对木薯生理指标和农艺性状的影响[J].广东农业科学,2015,42(23):96-100 |
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施氮量对木薯生理指标和农艺性状的影响 |
| Effects of nitrogen application level on physiologicalindexes and agronomic properties for cassava |
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| DOI： |
| 中文关键词: 木薯 氮肥 生理性状 产量 |
| 英文关键词: cassava nitrogen fertilizer physiological properties yield |
| 基金项目:：广西教育厅广西高等学校科研立项项
目（LX2014 673）；广西科技大学鹿山学院科学基金
（2013LSZK03） |
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| 摘要点击次数: 1522 |
| 全文下载次数: 590 |
| 中文摘要: |
| 为提高氮肥的利用效率，采用田间试验，研究施氮量（纯N 0、65、130、195 kg/hm2）对新选056
木薯生理、产量及品质的影响。结果表明：施氮量在0~130 kg/hm2 范围内，木薯生长中后期叶片POD 活性、
CAT 活性、脯氨酸含量、叶绿素含量及可溶性糖含量随施氮量的增加而明显增加，丙二醛含量则明显下降，
但继续增加施氮量，上述各项指标数值变化不明显；木薯株高、块根产量、块根淀粉含量及淀粉产量分别增加
7.43%~24.36%、5.77%~11.55%、3.96%~10.73%、9.96%~24.12%，且增幅均随施氮量的增加而增加，但施氮130
kg/hm2 与施氮195 kg/hm2 的差异均不显著。可见，施氮130 kg/hm2 已满足木薯增产的需求。 |
| 英文摘要: |
| In order to improve the using efficiency of N fertilizer，a field experiment was conducted to investigate
the effects of nitrogen application（0，65，130，195 kg N/hm2）on the physiology，yield and quality of cassava
cultivar Xinxuan056. Results showed the peroxidase activity，catalase activity，proline content，chlorophyll content
and soluble sugar content in leaves increased obviously at both root expanding and root mature stages，as the nitrogen
increased from 0 kg/hm2 to 130 kg/hm2，but malondialdehyde content in leaves decreased obviously. The physiological
properties of leaves changed slightly when the amount of nitrogen application was higher than 130 kg/hm2. The
plant height，fresh root yield，fresh root starch content and fresh root starch yield increased by 7.43%-24.36%，
5.77%-11.55%，3.96%-10.73% and 9.96%-24.12% respectively after nitrogen applieation，and their increments
increased with the increment of nitrogen applied，but the yield traits and quality traits were not significantly different
between 130 kg N/hm2 treatment and 195 kg N/hm2 treatment. Therefore，the optimum level of nitrogen fertilizer for
cassava was 130 kg/hm2. |
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