Higher Radiation Use Efficiency Produces Greater Biomass Before Heading and Grain Yield in Super Hybrid Rice
| Autor: | Zhifeng Lu, Yonghui Pan, Xusheng Meng, Jianwei Lu, Shiwei Guo, Kailiu Xie, Shiyu Wang, Shuai Gao |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Heading (navigation) chemistry.chemical_element Biomass radiation interception Radiation engineering.material 01 natural sciences lcsh:Agriculture parasitic diseases inbred super rice natural sciences Cultivar Mathematics radiation use efficiency lcsh:S technology industry and agriculture virus diseases food and beverages 04 agricultural and veterinary sciences Nitrogen Radiation interception chemistry Agronomy green leaf area index 040103 agronomy & agriculture engineering 0401 agriculture forestry and fisheries Grain yield super hybrid rice Fertilizer Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Agronomy Volume 10 Issue 2 Agronomy, Vol 10, Iss 2, p 209 (2020) |
| ISSN: | 2073-4395 |
| DOI: | 10.3390/agronomy10020209 |
| Popis: | To reveal the physiological mechanism underlying the yield advantage of super hybrid rice compared with inbred super rice, a super hybrid rice cultivar Yliangyou 3218 (YLY) and an inbred super rice cultivar Zhendao 11 (ZD) were field grown under five nitrogen (N) fertilizer rates in 2016 and 2017. The average grain yield of YLY across nitrogen fertilizer rates was 10.1 t ha&minus 1 in 2016 and 9.7 t ha&minus 1 in 2017, 29.6% and 21.3% higher than that of ZD in 2016 and 2017, respectively. YLY showed higher above-ground biomass accumulation, especially growth before heading, which was mainly due to its faster green leaf area index (GLAI) formation and greater maximum GLAI (GLAImax). The daily radiation interception (RIdaily) was 15.0% higher in YLY than ZD, but the accumulated radiation interception (RIacc) before heading showed little difference between them because ZD had a longer growth duration. The radiation use efficiency (RUE) of YLY before heading was 54.7% higher than that of ZD (YLY, 2.12 g MJ&minus 1 ZD, 1.37 g MJ&minus 1). Our result demonstrated that the yield advantage of YLY was due to its higher above-ground biomass before heading, which was mainly achieved by its improvement in RUE rather than radiation interception. |
| Databáze: | OpenAIRE |
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