不同生态环境下水稻基因型产量形成与源库特性的比较 - 应用生态学报.pdf

2005 4 16 4 CHINESE JOURNAL OF APPLIED ECOLOGY, Apr . 2005, 16( 4)#615~ 6 19 * * * 王 勋 戴廷波 姜 东 荆 奇 曹卫星 ( , 210095) IRRI 9 , 9 , . , . , . LAI ( CGR) . , LAI , . , LAI( CGR) . CGR ( LAI) 100 1- 9332( 2005) 04- 06 15- 05 S5 11 A Yieldformation and sourcesink characteristics of rice genotypes under two different ecoenvironments. WANG Xun, DAI T ingb , JIANG D ng, JING Qi, CAO Weix ing ( K ey L abor atory of Cr op Grow th Reg ulation , M in istry of A gr icultur e, N anj ing A gr icultur al Univ ersity , N anj ing 2 10095, China . Chin . J . Ap p l . Ecol . , 2005, 16( 4) : 6 15~ 619. With nine Japanese varieties and tw l cal cultivars f rice as test materials, this paper studied the characteristics f their yieldf rmati n and s urcesink characteristics under different ec envir nments f Nanjing and Lijiang . The results sh w ed that ecenvir nment had an bvi us effect n rice grain yield and dry matter accumulati n. Highyielding rice gen types c uld accumulate m re dry matter, especially in their late gr w th peri d. They had higher t tal spikelet number, leaf area index ( LAI) and cr p gr wth rate ( CGR) , as c mpared w ith ther gen types. The grain y ield increased w ith increasing t tal dry matter accumulati n, and significantly p sitively c rre lated with dry matter accumulat i n after heading, t tal spikelet number, LAI, and spikelet/ leaf area rat i . The results suggested that t he l wer grain y ield in Nanjing than in Lijiang was mainly resulted fr m the l w er LAI, t tal spikelet, dry matter accumulati n and CGR after heading. Key words Rice, Gen type, Dry matter accumulati