上海农业学报2018，Vol.34Issue(2)：1-7,7.DOI:10.15955/j.issn1000-3924.2018.02.01
肥料运筹对机穴播水稻群体生长效应及产量的影响
Effect of fertilizer application on the yield and population growth of mechanical hill-seeding rice
摘要
Abstract
The yield and population growth of precision mechanical hill-seeding hybrid rice'Huayou 14' (Japonica)were studied by means of fertilizer application of available nitrogen fertilizer and slow-release fertilizer.The results showed that under the same nitrogen level,the rice whole growth period of the combined treatment of urea and slow-release fertilizer increased by 10—11 d compared with that of urea treatment.The daily growth of plant height was significantly higher than that of urea treatment at jointing to booting stage,and the plant height increased by(4.03 ± 0.48)cm compared with urea treatment.After jointing stage,the proportion of rice biomass accumulation to total biomass and leaf area index (LAI)treated with urea and slow release fertilizer were all higher than those of urea treatment.After heading,the relative chlorophyll content (SPAD)of rice flag leaves decreased slowly after reaching the peak of the treatment with urea and slow release fertilizer, while the SPAD of urea treatment decreased faster.Nitrogen had a significant effect on the total leaf number of the main stem of rice.The treatment of N2,N3,N5and N7increased 1 leaves than N0,N1and N4.The analysis of nitrogen and yield fitting equation showed that the rice yield increased with the increase of nitrogen application, but the 311.47 kg/hm2threshold had the risk of reducing yield.Under the same nitrogen condition,the yield of combined treatment of urea and slow-release fertilizer was all higher than that of urea treatment.The yield of N6 treatment was the highest,reaching(11 837.25 ± 327.12)kg/hm2.The analysis of yield components showed that the order of the effect of nitrogen on yield components was effective panicles per unit area,spike grain number, seed setting rate and grain weight.The effective panicles and the seed setting rate of combined treatment of urea and slow-release fertilizer were higher than those of urea treatment under the same nitrogen level. There were significant differences in the effective panicles between the treatment of N5and N1and the treatment N6and N2, and the difference of seed setting rate between N1and N7was significant.The spike grain number of N2was the highest,which was significantly higher than that of other treatment.关键词
肥料运筹/机穴播/生长效应/水稻Key words
Fertilizer application/Mechanical hill-seeding/Growth effect/Rice(Japonica)分类
农业科技引用本文复制引用
王新其,李茂柏,赵志鹏,王玲燕,朱峰,曹黎明..肥料运筹对机穴播水稻群体生长效应及产量的影响[J].上海农业学报,2018,34(2):1-7,7.基金项目
上海市水稻产业技术体系建设[沪农科产字(2017)第3号] （2017）
上海市农委科技成果推广项目[沪农科推字(2015)第4-2号] （2015）
