当前位置: X-MOL 学术J. Integr. Agric. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Effects of seedling age on the growth stage and yield formation of hydroponically grown long-mat rice seedlings
Journal of Integrative Agriculture ( IF 4.6 ) Pub Date : 2020-06-02 , DOI: 10.1016/s2095-3119(19)62756-5
Yu-xiang LI , Yang LIU , Yu-hui WANG , Yan-feng DING , Shao-hua WANG , Zheng-hui LIU , Gang-hua LI

Understanding the characteristics of rice productivity is of great importance for achieving high yield formation. However, such traits have not yet been studied for different ages of hydroponically grown long-mat rice seedlings (HLMS), which constitutes a new method of seedling cultivation. Field experiments were conducted to evaluate the effects of seedling age on the growth stage, photosynthesis characteristics, dry matter production, and yield of HLMS. A conventional japonica rice cultivar (Wuyunjing 24) and an indica hybrid rice cultivar (6 Liangyou 9368) were used as test materials. The results showed that the whole phase was shortened by 13–15 days for young seedlings (13-day-old) compared with old seedlings (27-day-old), which occurred because the growth process accelerated with the transplantation of young seedlings. As seedling age increased, the dry matter weight of stems of individual plants and of the population increased at the transplanting stage but decreased at the maturity stage (MS). Compared with that of 27-day-old seedlings, the average ratio of panicle weight to total plant dry weight of 13-day-old seedlings during a 2-year period increased by 3.71% for Wuyunjing 24 and by 3.78% for 6 Liangyou 9368 at the MS. Moreover, as seedling age increased, the leaf area index and photosynthetic potential decreased for both cultivars, and the photosynthetic rate markedly decreased at the heading stage (HS). With the exception of that of Wuyunjing 24 from the jointing stage to the HS in 2014, the crop growth rate was higher for young seedlings than for old seedlings. Grain yield significantly decreased with seedling age, but no significant difference was detected between the 13- and 20-day-old seedlings for either cultivar. Therefore, equilibrious and high biological yield formation, vigorous growth in the late stages, and high photosynthetic production capacity are important characteristics and causes of the efficient and sustainable output of photosynthetic systems and for achieving high yield formation in young transplanted seedlings (13–20-day-old).



中文翻译:

苗龄对水培长草水稻幼苗生长阶段和产量形成的影响

了解水稻生产力的特性对于实现高产形成至关重要。然而,尚未针对不同年龄的水培长草水稻幼苗(HLMS)研究这种性状,这构成了一种新的幼苗栽培方法。进行了田间试验,以评估幼苗年龄对HLMS的生长阶段,光合作用特性,干物质生产和产量的影响。常规粳稻水稻品种(武运粳24)和以杂交水稻新品种(良优9368)为试验材料。结果表明,与老龄幼苗(27天龄)相比,年轻幼苗(13天龄)的整个阶段缩短了13-15天,这是因为随着幼苗的移植,生长过程加快了。随着幼苗年龄的增加,单个植物的茎和种群的干物质重量在移植阶段增加,而在成熟阶段(MS)下降。与27日龄幼苗相比,乌云粳24号2日龄13日龄幼苗的穗重与总植株干重的平均比值增加了3.71%,而良友9368则增加了3.78%。在MS。此外,随着幼苗年龄的增加,两个品种的叶面积指数和光合潜力均下降,在抽穗期(HS),光合速率显着下降。除了从拔节期到HS期间的2014年乌云粳24号,年轻秧苗的农作物生长速率均高于老秧苗。籽粒产量随幼苗年龄的增长而显着降低,但是对于这两个品种,在13天和20天龄的幼苗之间均未发现显着差异。因此,平衡而高的生物产量形成,后期的旺盛生长以及高光合生产能力是重要的特征和原因,是光合系统有效和可持续输出的原因,也是在年轻移植幼苗中实现高产量形成的原因(13–20-天)。除了从拔节期到HS期间的2014年乌云粳24号,年轻秧苗的农作物生长速率均高于老秧苗。籽粒产量随着幼苗年龄的增长而显着降低,但是对于任何一个品种而言,在13日龄和20日龄幼苗之间均未发现显着差异。因此,平衡而高的生物产量形成,后期的旺盛生长以及高光合生产能力是重要的特征和原因,是光合系统有效和可持续输出的原因,也是在年轻移植幼苗中实现高产量形成的原因(13–20-天)。除了从拔节期到HS期间的2014年乌云粳24号,年轻秧苗的农作物生长速率均高于老秧苗。籽粒产量随着幼苗年龄的增长而显着降低,但是对于任何一个品种而言,在13日龄和20日龄幼苗之间均未发现显着差异。因此,平衡而高的生物产量形成,后期的旺盛生长以及高光合生产能力是重要的特征和原因,是光合系统有效和可持续输出的原因,也是在年轻移植幼苗中实现高产量形成的原因(13–20-天)。但是对于这两个品种,在13天和20天龄的幼苗之间都没有发现显着差异。因此,平衡而高的生物产量形成,后期的旺盛生长以及高光合生产能力是重要的特征和原因,是光合系统有效和可持续输出的原因,也是在年轻移植幼苗中实现高产量形成的原因(13–20-天)。但是对于这两个品种,在13天和20天龄的幼苗之间都没有发现显着差异。因此,平衡而高的生物产量形成,后期的旺盛生长以及高光合生产能力是重要的特征和原因,是光合系统有效和可持续输出的原因,也是在年轻移植幼苗中实现高产量形成的原因(13–20-天)。

更新日期:2020-06-02
down
wechat
bug