| 超级稻甬优12不同产量水平群体的钾素营养特性 |
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| 引用本文： | 韦还和,孟天瑶,李超,张洪程,戴其根,马荣荣,王晓燕,杨筠文.超级稻甬优12不同产量水平群体的钾素营养特性[J].作物学报,2016,42(7):1047-1057. |
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| 作者姓名： | 韦还和 孟天瑶 李超 张洪程 戴其根 马荣荣 王晓燕 杨筠文 |
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| 作者单位： | 1.扬州大学农业部长江流域稻作技术创新中心 / 江苏省作物遗传生理重点实验室, 江苏扬州 225009;2.浙江省宁波市农业科学院作物研究所, 浙江宁波 315101;3.浙江省宁波市种子公司, 浙江宁波315101;4.浙江省宁波市鄞州区农业技术服务站, 浙江宁波 315100 |
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| 基金项目： | 本研究由国家公益性行业(农业)科研专项(201303102), 农业部超级稻专项(02318802013231), 宁波市重大科技项目(2013C11001), 江苏省重点研发项目(BE2015340), 扬州大学研究生创新培养计划项目(KYLX15_1371), 扬州大学科技创新培育基金(2015CXJ042)和基于模型与GIS的高邮市小麦精确管理和诊断调控技术的开发与示范推广(SXGC[2013]248)资助。 |
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| 摘 要： | 2013-2014年，以超级稻甬优12不同产量群体为研究对象，系统比较研究甬优12高产(10.5~12.0 t hm-2)、更高产(12.0~13.5 t hm-2)、超高产(>13.5 t hm-2)3个产量群体的钾素吸收与积累特征差异。结果表明：(1)甬优12超高产、更高产和高产群体的两年平均产量分别为13.9、12.6和10.8 t hm-2。(2)拔节期植株含钾量呈高产群体>更高产群体>超高产群体；抽穗期和成熟期植株含钾量呈超高产群体>更高产群体>高产群体；拔节期3个产量群体间钾素吸收量差异不显著，超高产群体抽穗期和成熟期钾素吸收量分别为364.1 kg hm-2和374.6 kg hm-2，显著高于更高产(326.7 kg hm-2、331.1 kg hm-2)和高产群体(282.8 kg hm-2、284.1 kg hm-2)。(3)随产量上升，植株钾素积累量播种至拔节期随之下降，而拔节至抽穗期随之增加。播种至拔节期钾素积累量与产量呈极显著线性负相关，拔节至抽穗期钾素积累量与产量呈极显著线性正相关。(4)与对照相比，甬优12超高产群体抽穗期和成熟期茎鞘、叶片和穗部钾素吸收量较高且与产量呈显著或极显著线性正相关。(5)与对照相比，尽管甬优12超高产群体钾素吸收总量较高，但其籽粒生产率和钾素偏生产力较低，表明甬优12超高产群体钾素利用率较低，在今后甬优12超高产栽培管理中应重视钾肥的高效利用。最后就提高甬优12超高产群体钾素吸收利用的措施进行了探讨。
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| 关 键 词： | 超级稻 甬优12 不同产量群体 钾素吸收、积累 |
| 收稿时间： | 2015-11-13 |
Potassium Nutrition Characteristics in Different Yield Populations of Super Rice Yongyou 12 |
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| WEI Huan-He,MENG Tian-Yao,LI Chao,ZHANG Hong-Cheng,DAI Qi-Gen,MA Rong-Rong,WANG Xiao-Yan,YANG Jun-Wen.Potassium Nutrition Characteristics in Different Yield Populations of Super Rice Yongyou 12[J].Acta Agronomica Sinica,2016,42(7):1047-1057. |
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| Authors: | WEI Huan-He MENG Tian-Yao LI Chao ZHANG Hong-Cheng DAI Qi-Gen MA Rong-Rong WANG Xiao-Yan YANG Jun-Wen |
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| Institution: | 1.Innovation Center of Rice Cultivation Technology in Yangtze River Valley, Ministry of Agriculture / Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou 225009, China;2.Crop Research Institute, Ningbo Academy of Agricultural Sciences of Zhejiang Province, Ningbo 315101, China;3.Ningbo Seed Company of Zhejiang Province, Ningbo 315101, China;4.Agricultural Technology Extension and Service, Yinzhou District, Ningbo 315101, China |
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| Abstract: | A field experiment was conducted using super rice Yongyou 12 to compare the differences in absorption and accumulation characteristics of potassium among high yield population (HY, 10.5–12.0 t ha-1), higher yield population (HRY, 12.0–13.5 t ha-1), and super high yield population (SHY, ≥13.5 t ha-1) in 2013 and 2014. Results followed that, on an average across two years, grain yield of SHY was 13.9 t ha-1, significantly higher than that of HRY (12.5 t ha-1) and HY (10.9 t ha-1). HY showed higher K content in plants, followed by HRY and SHY, with no significant difference among them. K content at heading and maturity stages, showed a trend of SHY> HRY > HY, whileK uptake amount at jointing stage showed HY>HRY>SHY. K uptake amount at heading stage of SHY was 364.1 kg ha-1, significantly higher than that of HRY (326.7 kg ha-1) and HY (282.8 kg ha-1), respectively. K uptake amount at maturity stage of SHY was 374.6 kg ha-1, significantly higher than that of HRY (331.1 kg ha-1) and HY (284.1 kg ha-1), respectively. With increasing grain yield, K accumulation amount decreased from sowing to jointing stage, while increased from jointing to heading. Very significantly negative linear relationship was observed between K accumulation amount from sowing to jointing and grain yield. Very significantly positive linear relationship was observed between K accumulation amount from jointing to heading and grain yield. Compared with HY and HRY, SHY showed higher K uptake amount in the stem and sheath, leaf, and panicle at heading and maturity stages, which wassignificantly or very significantly and positivelycorrelated with grain yield. SHY showed higher K uptake amount but lower internal nutrient efficiency and K partial productivity, indicating its relatively lower K use efficiency, when compared with HY and HRY. Great attention should be paid for increasing K use efficiency in production of rice. Methods to improve K use efficiency in SHY of Yongyou 12 were discussed. |
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| Keywords: | Super rice Yongyou 12 Different yield populations Accumulation and absorption characteristics of potassium |
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