不同超级稻品种产量形成及其氮素吸收差异研究

Study on Yield Formation and Nitrogen Absorption for Different Genotype Supper Rice Varieties

以江西省水稻生产上推广的几个超级早稻、超级晚稻品种为材料,研究了长江中下游双季稻区不同超级稻品种产量形成、干物质生产及其氮素吸收特性。结果表明,同一栽培条件下,不同超级早、晚稻品种间干物质生产与转运、产量形成及氮素吸收存在一定的差异,生产100 kg籽粒所需的氮量差异不大。相关分析表明,超级早、晚稻总干物质积累量、茎叶干物质输出率和转换率与其产量均呈显著正相关。适宜在江西地区种植的超级早、晚稻品种分别为陆两优996、金优458和钱优1号、天优华占。

The experiments were conducted in middle and lower reaches of Yangtze River of double cropping rice, to study the feature of yield formation and dry matter production and its nitrogen accumulation of different super rice. The results showed that there were regular diversity between the dry matter production and transportation, yield formation and its nitrogen accumulation with the identical cultivation conditions. There was no significant difference among super early rice or super late rice on the N requirement for 100 kg grain. Correlation analysis indicated that the relationship between total dry matter accumulation of super early rice and late rice, the transportation and transformation ratio of dry matter in stems and leaves, and rice grain yield was significant positive correlation. The super early rice and late rice varieties Luliangyou 996, Jinyou 458, Qianyou 1 and Tianyouhuazhan, are suitable for planting in Jiangxi Province.