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作物学报 ›› 2010, Vol. 36 ›› Issue (09): 1547-1558.doi: 10.3724/SP.J.1006.2010.01547

• 耕作栽培·生理生化 • 上一篇    下一篇

杂交粳稻13.5thm-2超高产群体动态特征及形成机制的探讨

张洪程1,吴桂成1,李德剑2,肖跃成4,龚金龙1,李杰1,戴其根1,霍中洋1,许轲1,高辉1,魏海燕1,沙安勤3,周有炎3,王宝金4,吴爱国4   

  1. 1扬州大学农业部长江流域稻作技术创新中心/江苏省作物遗传生理重点实验室，江苏扬州225009；2兴化市丰源水稻研究所，江苏兴化225700；3兴化市作物栽培指导站，江苏兴化225700；4姜堰市作物栽培指导站，江苏姜堰225500
  • 收稿日期:2010-02-01 修回日期:2010-04-20 出版日期:2010-09-12 网络出版日期:2010-07-05
  • 基金资助:

    本研究由国家“十一五”科技支撑计划重大项目（2006BAD02A03）和超级稻配套栽培技术开发与技术集成（农业部专项）资助。

Population Characteristics and Formation Mechanism for Super-High- Yielding Hybrid Japonica Rice (13.5 t hm-2)

ZHANG Hong-Cheng1,WU Gui-Cheng1,LI De-Jian2,XIAO Yue-Cheng4,GONG Jin-Long1,LI Jie1,DAI Qi-Gen1,HUO Zhong-Yang1,XU Ke1,GAO Hui1,WEI Hai-Yan1,SHA An-Qin3,ZHOU You-Yan3,WANG Bao-Jin4,WU Ai-Guo4   

  1. 1Innovation Center of Rice Cultivation technology in Yangtze Valley,Ministry of Agriculture/Key Laboratory of Crop Genetic and Physiology of Jiangsu Province,Yangzhou University,Yangzhou 225009, China;2 Rice Research Institute of xianghua, Fengyuan,Xinghua 22570,China;3Bureau of Agriculture of Xing hua County, Xinghua 225700,China;4 Bureau of Agriculture of Jiangyan County,Jiangyan 225500,China
  • Received:2010-02-01 Revised:2010-04-20 Published:2010-09-12 Published online:2010-07-05

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摘要： 选用杂交粳稻甬优8号，以国家粮食丰产工程兴化、姜堰实施基地1.0 hm2连片与6.67 hm2连片超高产攻关方为依托，研究了13.5 t hm-2超高产群体特征，并探讨了群体形成机制。结果表明，较之12.0 t hm-2左右群体，13.5 t hm-2群体的穗型大，群体颖花量多(60 000×104 hm-2以上)，有效穗数、结实率和千粒重与之相当；群体茎蘖于生育前期稳步增长，至有效分蘖临界叶龄期达适宜穗数，高峰苗出现在拔节期，数量少，为预期穗数的1.3倍左右，此后群体平缓下降，至抽穗期达适宜穗数，成穗率高(＞75%)；群体叶面积指数前期增长相对较缓慢，最大值出现在孕穗期，为8.5左右，此后下降缓慢，成熟期仍保持在4.0以上；群体光合势生育前期较小，中、后期较大，总光合势为6.75×106 m2 d hm-2以上，抽穗至成熟期的光合势占总光合势的45.0%以上；群体拔节前干物质积累速度相对较缓、积累量略低，拔节后积累速度较快，至抽穗期群体生物量为13.5 t hm-2以上，抽穗后积累量亦高，一般为9.75 t hm-2以上, 总干物重高23.25 t hm-2以上。13.5 t hm-2超高产群体形成机制为，依靠精苗，发大蘖，及时够苗，提高够苗期群体质量(有效分蘖临界叶龄期)，为中期高质量群体结构的培育奠定生物学基础；依靠合理的群体动态及其规模，培育适宜数量的壮秆大穗，于抽穗期形成具有强抗倒力和巨量安全库容的高光效群体；依靠平稳消退的光合系统，提高抽穗后群体光合物质生产力，增大群体库容的总充实量，并维持较大的茎鞘强度，增强群体的安全抗倒力。

关键词: 杂交粳稻, 超高产, 群体特征, 形成机制

Abstract: Population characteristics of super-high-yielding hybrid japonica rice (13.5 t ha-1) were studied and its formation mechanism was explored using Yongyou 8 as material in Xinghua and Jiangyan. Results showed that population of 13.5 t ha-1 had more spikelets per panicle and total spikelets than population of 12.0 t ha-1. There was no significant difference in panicles, filled-grain percentage and 1000-grain weight between populations of 13.5 t ha-1 and 12.0 t ha-1. Population of 13.5 t ha-1 exhibited fewer tillers at the early growth stage and achieved excepted number of stems and tillers at critical leaf-age for productive tillers, whose max number of stems and tillers was at jointing stage and was about 1.3 times of excepted number. Then, the number of population stems and tillers began to decrease stably, which achieved expected number again. At last, ratio of productive tillers to total tillers of 13.5 t ha-1 population was more than 75%, which was higher than that of population of 12.0 t ha-1.The leaf area index of 13.5 t ha-1 population was lower than that of 12.0 t ha-1 population at the early growth stage, and the max leaf area index was about 8.5 at booting, which decreased stably and was above 4.0 at maturity. The photosynthetic potential of population with 13.5 t ha-1 was small at early stage and larger at middle and late stages, as compared with population with 12.0 t ha-1. The total photosynthetic potential was above 6.75×106 m2 d ha-1, of which most than 45.0% was from heading to maturity. The dry matter accumulation was smaller compared with population with 12.0 t ha-1 before jointing, and the weight of it was above 60 kg ha-1 at heading, which was significantly higher than that of population with 12.0 t ha-1. The total weight of dry matter was above 23.25 t ha-1, of which above 9.75 t ha-1 was accumulated from heading to maturity. Formation mechanism of super-high yielding population (13.5 t ha-1) was that: population quality was enhanced at critical leaf-age for productive tillers through cultivating strong seedlings, germinating low positiontillers and achieved expected number of stems and tillers in time, which formed the biological foundation for high quality population at middle stage; in order to form high photosynthetic efficiency of population structure with strong lodging-resistance and large population spikeletes at heading, suitable number of strong stems and large panicles was cultivated through establishing suitable dynamic and size of population; in order to enlarge sink-filling and keep strength of stems and sheaths, dry matter accumulation was enriched after heading through photosynthetic system smooth and steady fade away.

Key words: Hybrid Japonica rice, Super*high yielding, Characteristics of population, Formation mechanism

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