Although a lot of researches have been done on yield characteristics of japonica/indica hybrid rice, there is little information on differences of yield characteristics between different types of hybrid. To determine common characteristics of japonica/indica hybrid rice (JIHR) and identify the differences between different types of JIHR, the present study assessed yield characteristics, such as panicle trait, leaf area index (LAI), above-ground biomass accumulation, and nitrogen absorption and utilization, among three types of cultivar of JIHR. In our field experiments, three types of JIHR, e.g., Yongyou, Chunyou and Jiayouzhongke, were divided, and each of them has two cultivars, which were used as materials, meanwhile, using conventional japonica rice (CJR) Wuyingjing 31 and Sujing 9 were as controls. The results showed that the mean yield of those JIHR was above 12 t ha⁻¹ in 2017 and 2018, and was 31.9 and 32.2%, respectively higher than that of CJR in the two years. Spikelet number per panicle of JIHR resulted in high yield. Higher yield of JIHR was likely contributed to greater panicle number and more spikelets per panicle. Higher yielding JIHR showed stronger tillering capacity, larger LAI and above-ground biomass accumulation from jointing to heading stages, which likely contributed to the higher number of spikelets per panicle. The long duration from heading to maturity stages allowed more nitrogen accumulation of higher yielding JIHR.

尽管已经对粳/ ind杂交稻的产量特性进行了大量研究，但关于不同类型杂交稻之间产量特性差异的信息很少。为了确定粳/ ind杂交稻（JIHR）的共同特征并确定不同类型的JIHR之间的差异，本研究评估了穗部性状，叶面积指数（LAI），地上生物量积累和氮素等产量特征JIHR的三种品种之间的吸收利用。在我们的田间试验中，划分了三种类型的JIHR，即永有，春有和家有中科，每种都有两个品种，分别用作材料，同时使用常规粳稻。水稻五英粳31号和苏粳9号为对照。结果表明，2017年和2018年，这些JIHR的平均产量均高于12 t ha ^-1，分别比CJR的平均产量高31.9％和32.2％。JIHR每穗的小穗数导致高产。JIHR的更高产量可能导致更大的穗数和每穗更多的小穗。从拔节到抽穗期，较高的JIHR表现出较强的分till能力，较大的LAI和地上生物量积累，这可能导致每穗穗数增加。从抽穗期到成熟期的持续时间较长，可以使更多的氮积累，从而获得更高的产量。