中国水稻科学2018，Vol.32Issue(1)：78-88,11.DOI:10.16819/j.1001-7216.2018.7069
水稻盆栽速效氮淋洗法及短期亏氮效果分析
Leaching Method of Available Nitrogen in Rice Potted Soil and Effect Analysis of Short-term Nitrogen Deficiency
摘要
Abstract
[Objective]This study aims to explore a simple and effective leaching method of available nitrogen in potted soil, and to reveal the effects of soil nitrogen deficiency at different periods before anthesis on nitrogen accumulation in main functional leaves and post-anthesis plant of different types rice, which would clarify the characteristics of nitrogen accumulation and translocation after anthesis, and lay the research foundation for reducing nitrogen fertilizer application.[Method]In this study, the effects of three leaching methods on available nitrogen reduction in potted soils were compared. Meanwhile, the effects of short-term nitrogen deficiency 14 d and 3 d before anthesis on SPAD value, nitrogen concentration of top-three leaves and plant nitrogen content after anthesis were discussed using indica-japanica hybirid rice Yongyou 12(YY12), and indica hybrid rice variety Zhongzheyou 1(ZZY1).[Results]The results showed that 85.6%nitrate nitrogen and 67.1% ammonium nitrogen in soil could be eluted by leaching structure + sandy /soil mixed matrix(T3) with 3 times of leaching. Under the two leaching treatments, the contents of nitrate and ammonium nitrogen in potted soil decreased by 42.1%-59.3% and 35.0%-43.9%, respectively. This could achieve the expected effect of reducing soil nitrogen to inhibit effectively the soil available nitrogen supply capacity in the short term. Affected by soil nitrogen deficiency before anthesis, SPAD value and nitrogen concentration of top-three leaves, stem-sheath, leaves, panicle and plant nitrogen content at the 10th day after heading of YY12 were decreased significantly. At the same time, there was a remarkable difference of stem-sheath, panicle and plant nitrogen content between the two leaching treatments. SPAD value and nitrogen concentration of top-three leaves, panicle and plant nitrogen content at the 10th day after heading of ZZY1 were also decreased dramatically under the leaching treatment 14 d before anthesis. However, the leaching treatment 3 d before anthesis had little effect on nitrogen concentration of top-three leaves and plant nitrogen content.[Conclusion]In conclusion, the sensitivity of rice to nitrogen deficiency 14 d before anthesis(meiosis stage) was greatly higher than that 3 d before anthesis. The sensitivity of leaf color and nitrogen concentration of leaves at different leaf positions to soil nitrogen deficiency were enhanced from bottom to top. The influence of soil nitrogen deficiency at the two leaching periods on YY12 was greater than that of ZZY1, which means that the lower demand for soil available nitrogen of indica hybrid rice ZZY1 after anthesis, and the higher demand of indica-japanica hybirid rice YY12 after the meiosis period.关键词
水稻/淋洗/速效氮/氮亏缺/减数分裂期/花后Key words
rice/leaching/available nitrogen/nitrogen deficiency/meiosis stage/post-anthesis分类
农业科技引用本文复制引用
武辉,朱德峰,向镜,陈惠哲,张玉屏,张义凯,姬广梅,王亚梁,史鸿志,张文倩..水稻盆栽速效氮淋洗法及短期亏氮效果分析[J].中国水稻科学,2018,32(1):78-88,11.基金项目
国家重点研发计划资助项目(2016YFD0300502,2016YFD0200801) （2016YFD0300502,2016YFD0200801）
国家自然科学基金资助项目(31501272) （31501272）
2015年浙江省三农六方项目 （）
现代农业产业技术体系建设专项(ARS-01-22). （ARS-01-22）
