摘要
以北方粳稻品种"长白9"、"东稻4"为试材,研究了水稻土(pH=7.25,ESP=7.60)、苏打盐碱土壤(pH=9.11,ESP=32.80)条件下两品种穗部性状及产量构成的变化规律。结果表明:与水稻土相比,在苏打盐碱土壤条件下,两品种大部分穗部性状有显著变化,枝梗数、枝梗长度、枝梗粒数均显著下降;各产量构成因素也发生显著变化,尤其是穗粒数显著减少("东稻4"减少30.0%,"长白9"减少30.5%);单株产量与穗部性状相关分析表明,穗粒数较结实率、千粒重对产量的贡献率最大;每穗一次枝梗总粒数的减少主要受每穗一次枝梗数减少的影响,每穗二次枝梗总粒数的减少受每穗二次枝梗数及二次枝梗单枝着粒数减少共同影响;在苏打盐碱土壤条件下,相对一次枝梗来说,二次枝梗粒数更容易受环境影响。
Taking the Northern Japonica rice varieties Dongdao 4 and Changbai 9 as test materi als, this paper studied the characteristics of their panicle traits and yieht components on paddy soil （pH = 7.25, ESP = 7.60） and soda salinesodic soil （pH = 9.11, ESP = 32.80）. As com pared with those on the paddy soil, most panicle traits of the rice varieties on the soda salinesod ic soil changed significantly, with a significant decrease in the branch number, branch length, and grain number. The grain yield components on the soda salinesodic soil also had great change, among which, the grain number decreased significantly, with a decrement of 30.0% and 30.5 % for the Dongdao 4 and Changbai 9, respectively. The correlation analysis of the grain yield per plant and the panicle traits showed that the spikelet per panicle had more contribution to the grain yield than the seed setting rate and 1000grain weight. The decrease of the amount of primary branches could reduce the total grains of the primary branches per panicle, while the to tal grains of the secondary branches per panicle could be affected by both the amount of seconda ry branches and the grains per branch. On the soda salinesodic soil, the secondary branch grains could be more sensitive to the changes of the environment, as compared with the primary branch grains.
出处
《生态学杂志》
CAS
CSCD
北大核心
2013年第1期59-63,共5页
Chinese Journal of Ecology
基金
农业科技成果转化资金项目(2011GB24910004)资助
关键词
水稻
盐碱
穗部性状
产量
rice
salt and alkali
panicle trait
yield.
