超级稻甬优12不同产量水平群体的钾素营养特性
Potassium Nutrition Characteristics in Different Yield Populations of Super Rice Yongyou 12
摘要
Abstract
A field experiment was conducted using super rice Yongyou 12 to compare the differences in absorption and accumula-tion 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, while K 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), respec-tively. 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 was significantly or very significantly and positively correlated 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 effi-ciency in production of rice. Methods to improve K use efficiency in SHY of Yongyou 12 were discussed.关键词
超级稻/甬优12/不同产量群体/钾素吸收和积累Key words
Super rice/Yongyou 12/Different yield populations/Accumulation and absorption characteristics of potassium引用本文复制引用
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):1047-1057,11.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。 This study was supported by China Special Fund for Agro-scientific Research in the Public Interest (201303102), the Special Program of Super Rice of the Ministry of Agriculture (02318802013231), the Great Technology Project of Ningbo City (2013C11001), the Key Projects of Jiangsu Province (BE2015340), Innovative Training Program of Yangzhou University (KYLX15_1371), Science and Technology Innova-tion Fund of Yangzhou University (2015CXJ042), and Precise Diagnosis and Management of Control Technology Based On Modelling and GIS of Gaoyou City (SXGC[2013]248) （农业）
