中国水稻科学2012，Vol.26Issue(3)：311-319,9.DOI:10.3969/j.issn.1001-7216.2012.03.009
抛秧立苗对水稻光合特性和物质生产的影响
Effect of Seedling Standing and Establishment on Photosynthetic Characteristics and Matter Production of Broadcasted Rice
摘要
Abstract
The photosynthetic characteristics and matter production of broadcasted rice seedlings were studied to lay a theoretic basis for high-yielding and super-high-yielding cultivation of broadcasted rice with Nanjing 44 as material under five treatments including the upright seedlings with soil(USWS), leaning seedlings with soil(LESWS), lying seedlings with soil(LASWS), lying seedlings without soil(LASWTS). upright seedlings without soiKUSWTS). Results were as follows. 1) Seedling standing speed showed the trend of LESWS> LASWS> LASWTSs 2) LAI of LASWTS kept decreasing during seedling standing period, while LAI of others increased. The proportions of yellow leaf in LASWTS. USWTS. LESWS, LASWS and USWS reached their peaks at 8 d, 6 d. 2 d, 2 d. 2 d after broadcasting, respectively, and fell thereafter. 3) The dry weight of the above-ground parts all increased except LASWTS during the seedling standing period, with the general increasing rate of USWS>LESWS>LASWS>LESWTS> USWTS. Moreover, the dry matter accumulation, leaf area duration and net assimilation rate under various treatments showed the same trend. 4) Tiller number, population LAI, effective LAI rate, efficient LAI rate, ratio of grain to leaf area, photosynthetic potential, net assimilation rate, dry matter accumulation and growth rate of broadcasted rice at different growth stages all exhibited the trend of USWS>LESWS. USWTS>LASWS>1.ASWTS. and the net photasymhetic rate at heading stage and 20 d after heading showed the same trend as well. Given these observations, it could be concluded that ihe process of standing and establishment of seedlings with soil was faster than that without soil, and that of upright or leaning seedlings was faster than that of lying seedlings, which could be altributed to their stronger population growth during the whole period. Therefore, it is needed to choose seedlings with soil and to increase the proportion of the upright seedlings in order to obtain better photosynthetic characteristics and higher matter production capability, thus making for preferable plant growth and higher yield formation.关键词
水稻/抛秧/立苗/光合特性/干物质量Key words
ricei broadcasted seedlings / seedling standing/ photosynthetic characteristics/ matter production分类
农业科技引用本文复制引用
郭保卫,戴其根,霍中洋,高辉,朱聪聪,邢琳,黄幸福,张洪程,张春华,陈厚存,许轲,周兴涛,张军,陈京都,魏海燕..抛秧立苗对水稻光合特性和物质生产的影响[J].中国水稻科学,2012,26(3):311-319,9.基金项目
国家自然科学基金资助项目(30771273) （30771273）
江苏省粮食丰产科技工程(BE2009425) （BE2009425）
江苏省农业科技自主创新资金资助项目(CX(10)12g) （CX(10）
江苏省普通高校研究生科研创新计划资助项目(CXLX11-1018) （CXLX11-1018）
农业部超级稻选育与示范专项. （）
