摘要
以27份中稻和29份晚稻亲本材料为供试材料,采用系统聚类方法将供试材料按产量分为高、中、低产三个类型,通过大田试验比较了不同产量类型、不同生育阶段的干物质生产和磷素吸收利用的差异。结果表明,1)不同生育类型水稻产量、磷吸收及利用效率存在极显著的基因型差异,中稻和晚稻最高产量分别是最低产量的3.24和2.15倍;晚稻高产类型产量较中稻高12.69%,但磷利用效率差异不显著。2)中稻高产类型磷积累量在分蘖拔节期最大,晚稻高产类型在拔节抽穗期最大;中稻和晚稻高产类型干物质量均在分蘖拔节期最小,拔节抽穗期最大,出现前小、中强、后高的现象。3)中稻干物质量和磷积累量均在分蘖拔节期对产量贡献率最大,分别为42.38%和58.09%;晚稻磷积累量在抽穗成熟期对产量贡献率最大,为39.35%,干物质量在此阶段也较高,为16.16%。因此,营养生长阶段的干物质积累和磷的吸收对中稻产量影响较大,而对晚稻产量影响较大的是在生育后期。
Twenty seven of middle-season and twenty nine of late rice cultivars were taken as testing materials , their genotypes were assigned into three groups of high , middle and low yields by least square and dynamic clustering method .The biomass and phosphorus absorption were investigated in different growth stages for various yield types using field experiment .There was extremely significant genotype differences in rice yield , phosphorus absorption and use efficiency among the rice cultivars in different growth stages .The maximum yields were 3.24 and 2.15 times higher than the minimum yields for data obtained from middle-season rice and late rice , respectively .The yield of late rice was 12.69% higher than middle-season rice , but the difference was no significant in phosphorus use efficiency between them .The largest phosphorus accumulation was in tillering-jointing stage for middle-season and high yield type , and in jointing-heading stage for late and high yield rice .There is not much dry matter accumulation in tillering-jointing stage , the largest accumulation was in jointing-heading stage for both the middle-season and late high yield rice .Dry matter and phosphorus accumulation during tillering-jointing stage played main role in yield of middle-season rice with the highest contribution rate to yield of up to 42.38%and 58.09%, respectively .The phosphorus accumulation during heading-maturing stage is important in yield of late rice with the highest contribution rate of up to 39.35%, and 16.16% of the dry weight was accumulated in this stage.In conclusion , the cumulative dry matter during tillering-heading stage and phosphorus absorption during tillering-jointing stage play key role in yield formation of middle-season rice , the cumulative dry matter in early stage and phosphorus in late stage are important to the yield of late rice.
出处
《植物营养与肥料学报》
CAS
CSCD
北大核心
2014年第3期588-597,共10页
Journal of Plant Nutrition and Fertilizers
基金
四川省科技支撑项目(2013NZ0044
2013NZ0029)
四川省科技支撑计划项目(2014NZ0008)资助
