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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。
Under the conditions of paddy soil (pH = 7.25, ESP = 7.60), soda ash and saline soil (pH = 9.11, ESP = 32.80) with northern japonica rice variety Changbai 9 and Dongdao 4 as test materials, Variation of panicle traits and yield components of the next two varieties. The results showed that compared with paddy soils, most of the panicle traits of two cultivars changed significantly under sodic saline-alkali soil conditions. The number of stems, the length of stems and the number of stems and stems were significantly decreased, and the components of yield were also significantly different The number of spikelets was significantly decreased (“Dongdao 4” decreased by 30.0% and “Changbai 9” decreased by 30.5%). The correlation analysis between single plant yield and panicle traits showed that the number of spikelets per plant was higher than that of seed set, The contribution of 1000-grain weight to the yield was the largest. The decrease of the total grain number of the primary branchlets per panicle was mainly affected by the decrease of the number of primary branchlets per panicle. The reduction of the total number of the second branchlets per panicle was affected by the number of secondary branches and secondary In the case of soda-saline-alkali soil, the number of secondary branchlets is more likely to be affected by the environment than the primary branch.