[1]李刚华,王惠芝,王绍华,等.穗肥对水稻穗分化期碳氮代谢及颖花数的影响[J].南京农业大学学报,2010,33(1):1-5.[doi:10.7685/j.issn.1000-2030.2010.01.001]
 LI Gang-hua,WANG Hui-zhi,WANG Shao-hua,et al.Effect of nitrogen applied at rice panicle initiation stage on carbon and nitrogen metabolism and spikelets per panicle[J].Journal of Nanjing Agricultural University,2010,33(1):1-5.[doi:10.7685/j.issn.1000-2030.2010.01.001]
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穗肥对水稻穗分化期碳氮代谢及颖花数的影响()
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《南京农业大学学报》[ISSN:1000-2030/CN:32-1148/S]

卷:
33卷
期数:
2010年1期
页码:
1-5
栏目:
出版日期:
2010-01-31

文章信息/Info

Title:
Effect of nitrogen applied at rice panicle initiation stage on carbon and nitrogen metabolism and spikelets per panicle
作者:
李刚华王惠芝王绍华王强盛郑永美丁艳锋
南京农业大学农业部南方作物生理生态重点开放实验室,江苏,南京,210095;云南烟草公司玉溪市公司,云南,澄江,652500
Author(s):
LI Gang-hua WANG Hui-zhi WANG Shao-hua WANG Qiang-sheng ZHENG Yong-mei DING Yan-feng
Key Laboratory of Crop Physiology and Ecology in Southern China, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China; Yunnan Yuxi Tobacco Company, Chengjiang 652500, China
关键词:
水稻 穗分化期 碳氮代谢 颖花数
Keywords:
rice panicle initiation stage carbon and nitrogen metabolism spikelets
分类号:
S511
DOI:
10.7685/j.issn.1000-2030.2010.01.001
文献标志码:
A
摘要:
以粳稻品种武育粳3号和86优8号为材料进行盆栽试验,研究了0、60、120、180、240 kg·hm^{-2}穗肥施氮量对水稻穗分化期碳氮代谢及颖花数形成的影响。结果表明:穗分化前期(抽穗前32~20 d)水稻氮代谢旺盛,后期碳代谢旺盛。非结构性碳水化合物(non-structural carbohydrate,NSC)主要在库器官中积累。增加穗肥施氮量,加速了器官的氮积累却推迟了NSC的积累。氮积累量随穗肥氮用量的增加而逐渐增加,NSC积累量则呈单峰曲线变化。穗分化始期至抽穗期氮积累量与颖花数呈二次曲线关系,NSC积累量与颖花数呈极显著正相关,86优8号R^2=0.891 8^{**},武育粳3号R^2=0.880 0^{**}。说明适宜的穗肥氮有促进大穗的作用,主要与促进穗分化期NSC积累量有关。不同品种对氮供应量的反应不一致,穗分化期86优8号施氮量为120 kg·hm^{-2}、武育粳3号施氮量为180 kg·hm^{-2}处理的NSC总积累量最高,穗粒数最多。
Abstract:
Pot experiment under population-controlled was conducted in 2006 to investigate the effect of nitrogen fertilizer rates applied at panicle initiation stage of rice on non-structural carbohydrate(NSC) and nitrogen(N) metabolism and its relationship with spikelets per panicle. Japonica rice varieties 86 You 8 and Wuyujing 3 were planted with 5 panicle nitrogen fertilizer treatments as 0, 60, 120, 180, 240 kg·hm^{-2}, respectively. The results showed that N accumulation mainly occurred at 32-20 days before heading while NSC was mainly accumulated in sink during 12-0 days before heading. With the increasing panicle nitrogen rate, N accumulated at panicle initiation stage increased gradually while NSC accumulated increased parabolically. Conic-relationship existed between N accumulated and spikelets per panicle, whereas NSC accumulated significantly positively linear related with spikelets per panicle(R^2 = 0.891 8^{**} for 86 You 8 and R^2 = 0.880 0 ^{**} for Wuyujing 3). The results indicated that optimum panicle N rates could increase spikelets per panicle, which mainly resulted from the increased NSC accumulation. The optimum panicle N rate varied with the varieties, and the maximum spikelets per panicle appeared at 120 kg·hm^{-2} for 86 You 8 and 180 kg·hm^{-2} for Wuyujing 3.

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备注/Memo

备注/Memo:
国家粮食丰产工程项目(2006BAD02A03-2);国家自然科学基金项目(30871481);江苏高校研究生科研创新计划项目(CX08B-150Z);江苏省自然科学基金项目(BK2007579)
更新日期/Last Update: 2010-01-31