钾肥用量对甬优籼粳杂交稻物质积累及其产量的影响
Effects of Potassium Fertilizer Rate on Biomass Accumulation and Grain Yield of YongyouJaponica/indica Hybrids Series
摘要
Abstract
In order to investigate proper potassium application rate and its effects on growth and grain yield for Yongyoujapo-nica/indica hybrids series, a field experiment was conducted using Yongyou 12 and Yongyou 538 with five treatments of 0, 75, 150, 225, and 300 kg ha–1 potassium application. Results indicated that compared with check treatment (0 kg ha–1), potassium application increased yield by 9.2−14.0% for Yongyou 12, and 9.8−15.0% for Yongyou 538. In both years, the highest yield of Yongyou 12 and Yongyou 538 was both achieved at potassium application rate of 225 kg ha–1. Potassium application significantly increased number of panicles and spikelets per panicle. With the increase of potassium application rate, leaf area index and plant dry matter weight at jointing, heading, and maturity stages, as well as leaf area duration and dry matter accumulation from jointing to heading, and leaf area duration from heading to maturity were increased synchronously. Dry matter accumulation of plant from heading to maturity increased firstly and decreased then with the increase of potassium application rate, and the highest dry matter accumulation was achieved at potassium application rate of 225 kg ha–1. Compared with check treatment (0 kg ha–1), potassium application increased SPAD value, photosynthetic rate, and root blending rate from heading to maturity. Compared with check treatment (0 kg ha–1), potassium application increased significantly nitrogen and potassium absorption at jointing, heading, and maturity stage. Nitrogen and potassium accumulation from heading to maturity was increased firstly and decreased then with the increase of potassium application rate, and the highest nitrogen and potassium accumulation was achieved at potassium applica-tion rate of 225 kg ha–1. K partial productivity, internal nutrient efficiency in K, and K agronomy efficiency all decreased with the increase of potassium application rate.关键词
钾肥/甬优籼粳交杂交稻/产量Key words
Potassium fertilizer/Super rice of Yongyoujaponica/indica hybrids series/Grain yield引用本文复制引用
韦还和,霍中洋,许轲,魏海燕,郭保卫,孟天瑶,李超,史天宇,马荣荣,王晓燕,杨筠文,张洪程,戴其根..钾肥用量对甬优籼粳杂交稻物质积累及其产量的影响[J].作物学报,2016,42(8):1201-1214,14.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项目(SXGC[2013]248)资助。 This study was supported by the China Special Fund for Agro-scientific Research in the Public Interest (201303102), 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 Modeling and GIS of Gaoyou City (SXGC[2013]248) （农业）
