摘要
以Q优6号为材料,分析了不同地力条件下不同施氮水平对水稻叶片SPAD值和产量的影响。结果表明,水稻产量与表观供氮量存在极显著的曲线相关,且当表观供氮量在575.27 kg/hm^2时,Q优6号产量较高;不同处理下各生育时期SPAD值大小顺序为抽穗期>拔节期>成熟期,且差异主要表现在抽穗期和成熟期;拔节期和抽穗期不同地力和施氮水平下水稻冠层4张叶片各自的差异主要表现在顶3叶和顶4叶上,可以利用两者的SPAD值作为参数进行氮素营养诊断;SPAD值与表观供氮量之间存在显著线性相关,且采用SPAD_(L3×L4/mean)进行拟合时效果更好,均达到极显著水平。获取水稻叶片SPAD值次级指标可以实现对田块速效氮含量的估计。
SPAD value of rice canopy leaves and yield under different soil fertility＇and nitrogen application were analyzed, Qyou 6 as material. The results showed that the curve relationship between yield and apparent nitrogen supply was very significant, and there was a higher yield for Qyou 6 when apparent nitrogen supply was 575.27 kg/hm^2. The SPAD value of every growth stage under different soil fertility and nitrogen application was heading stage〉jointing stage〉maturity stage, and the difference of SPAD value were mainly at head- ing stage and maturity stage. The differences of SPAD value of four rice canopy leaves of different soil fertility and nitrogen application were mainly in third leaf and fourth leaf. Their SPAD values could be used as parameter to d^se the nutritional status of nitrogen. The linear relationship between SPAD value and apparent nitrpgen supply was significant, and the matching effect of adopting SPAD L3bd4/meen was best. The secondary index of SPAD value obtained from rice canopy leaves could estimate available nitrogen of soil.
作者
李杰
冯跃华
王旭
麻井彪
吴彦利
李香玲
叶勇
黄佑岗
牟桂婷
LI Jie FENG Ynehua WANG Xu MA Jingbiao WU Yanli LI Xiangling YE Yong HUANG Yougang MOU Guiting(College of Agronomy, Guizhou University, Guiyang 550025, Chin)
出处
《中国稻米》
北大核心
2017年第1期26-30,35,共6页
China Rice
基金
国家自然科学基金(31360311
31160263)
公益性行业(农业)科研专项(201503118-03)
贵州省农业科技攻关项目(黔科合NY[2011]3085号
黔科合NY[2013]3005号)
贵州省作物学省级重点学科建设计划(黔学位合字ZDXK[2014]8号)
贵州省普通高等学校粮油作物遗传改良与生理生态特色重点实验室项目(黔教合KY字[2015]333)
关键词
水稻
SPAD值
表观供氮量
速效氮
产量
rice
SAPD value
apparent nitrogen supply
available nitrogen
yield
