Ecological adaptability of rice cultivars with different types under the low temperature and weak sunshine condition
Besides the genetic cultivar characteristic and cultivation strategy, the environmental condition is considered as another important factor affecting the grain yield in rice. Previous studies were carried out on yield formation of rice under the low temperature and weak sunshine condition, however,...
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Zhejiang University Press
2016-01-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
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| Online Access: | https://www.academax.com/doi/10.3785/j.issn.1008-9209.2015.07.312 |
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| author | LI Min LUO Deqiang JIANG Xuehai ZHOU Weijia GI Guangmei WANG Xuehong LI Shuxing |
| author_facet | LI Min LUO Deqiang JIANG Xuehai ZHOU Weijia GI Guangmei WANG Xuehong LI Shuxing |
| author_sort | LI Min |
| collection | DOAJ |
| description | Besides the genetic cultivar characteristic and cultivation strategy, the environmental condition is considered as another important factor affecting the grain yield in rice. Previous studies were carried out on yield formation of rice under the low temperature and weak sunshine condition, however, the ecological adaptability such as yield formation, nitrogen accumulation and utilization of different thermos-photoperiod sensitive rice cultivars to the low temperature and weak sunshine is still obscure, as well as the response mechanism.The main objective of this study was to determine the ecological adaptability of different rice cultivars under the low temperature and weak sunshine condition in the middle and late growth duration. Field experiments were conducted in 2013 and 2014 in Guiyang, where was regarded as a representative eco-site with low temperature and weak sunshine,35 rice genotypes including released cultivars and potential rice combinations were used as a tested materials, and two ecology-adaptive cultivars (Zhuyou606 and Qianyou108) and two ecology-sensitive cultivars (Y Liangyou2 and Y Liangyou302) were selected out as a tested materials to study the differences in grain yield and yield formation, nitrogen accumulation and distribution, root characteristics.The results showed that: when values were averaged across cultivars and years, compared with the ecology-adaptive cultivars, the ecology-sensitive cultivars obtained a lower grain yield by 13.8%, which was mainly caused by a 9.9% lower filled grain ratio and 15.5% lower 1 000-grain mass. In comparison with the ecology-adaptive cultivars, the ecology-sensitive cultivars achieved 18.8%,10.8%,14.5% lower nitrogen accumulation amount at the mid-tillering (critical stage of productive tillering), heading, maturity stage, respectively, resulting in 17.9% lower nitrogen recovery efficiency (RE). Furthermore, a higher nitrogen accumulation amount in stem-leaves at the heading stage and a lower nitrogen accumulation amount in stem-leaves at the maturity stage were found in the ecology-sensitive cultivars, relative to the ecology-adaptive cultivars, and the nitrogen translocation amount from stems and leaves to panicle achieved 3.41 kg/667m<sup>2</sup>, which was 24.6% lower than that in the ecology-adaptive cultivars, the nitrogen translocation ratio from stems and leaves to panicle achieved 38.55%, which was 19.4% lower than that in the ecology-adaptive cultivars. The root bleeding intensity of ecology-adaptive cultivars achieved 20.2 kg/(h·667m<sup>2</sup>) at the heading stage and 4.55 kg/(h·667 m<sup>2</sup>) at the maturity stage, which were 8.8% and 21.6% lower than that in the ecology-adaptive cultivars, respectively.According to the results, a strategy to increase the grain yield of the ecology-adaptive cultivars is suggested: keeping a higher filled grain ratio and a higher 1 000-grain mass, which are able to be accomplished by increasing nitrogen accumulation during the growth period from heading to maturity. Moreover, these methods such as cultivating strong roots and improving root activity are helpful to increase the amount of nitrogen absorption. |
| format | Article |
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| institution | Kabale University |
| issn | 1008-9209 2097-5155 |
| language | English |
| publishDate | 2016-01-01 |
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| series | 浙江大学学报. 农业与生命科学版 |
| spelling | doaj-art-d6eafe780ec242849eebcb2157b16c6c2025-08-20T03:58:11ZengZhejiang University Press浙江大学学报. 农业与生命科学版1008-92092097-51552016-01-0142475210.3785/j.issn.1008-9209.2015.07.31210089209Ecological adaptability of rice cultivars with different types under the low temperature and weak sunshine conditionLI MinLUO DeqiangJIANG XuehaiZHOU WeijiaGI GuangmeiWANG XuehongLI ShuxingBesides the genetic cultivar characteristic and cultivation strategy, the environmental condition is considered as another important factor affecting the grain yield in rice. Previous studies were carried out on yield formation of rice under the low temperature and weak sunshine condition, however, the ecological adaptability such as yield formation, nitrogen accumulation and utilization of different thermos-photoperiod sensitive rice cultivars to the low temperature and weak sunshine is still obscure, as well as the response mechanism.The main objective of this study was to determine the ecological adaptability of different rice cultivars under the low temperature and weak sunshine condition in the middle and late growth duration. Field experiments were conducted in 2013 and 2014 in Guiyang, where was regarded as a representative eco-site with low temperature and weak sunshine,35 rice genotypes including released cultivars and potential rice combinations were used as a tested materials, and two ecology-adaptive cultivars (Zhuyou606 and Qianyou108) and two ecology-sensitive cultivars (Y Liangyou2 and Y Liangyou302) were selected out as a tested materials to study the differences in grain yield and yield formation, nitrogen accumulation and distribution, root characteristics.The results showed that: when values were averaged across cultivars and years, compared with the ecology-adaptive cultivars, the ecology-sensitive cultivars obtained a lower grain yield by 13.8%, which was mainly caused by a 9.9% lower filled grain ratio and 15.5% lower 1 000-grain mass. In comparison with the ecology-adaptive cultivars, the ecology-sensitive cultivars achieved 18.8%,10.8%,14.5% lower nitrogen accumulation amount at the mid-tillering (critical stage of productive tillering), heading, maturity stage, respectively, resulting in 17.9% lower nitrogen recovery efficiency (RE). Furthermore, a higher nitrogen accumulation amount in stem-leaves at the heading stage and a lower nitrogen accumulation amount in stem-leaves at the maturity stage were found in the ecology-sensitive cultivars, relative to the ecology-adaptive cultivars, and the nitrogen translocation amount from stems and leaves to panicle achieved 3.41 kg/667m<sup>2</sup>, which was 24.6% lower than that in the ecology-adaptive cultivars, the nitrogen translocation ratio from stems and leaves to panicle achieved 38.55%, which was 19.4% lower than that in the ecology-adaptive cultivars. The root bleeding intensity of ecology-adaptive cultivars achieved 20.2 kg/(h·667m<sup>2</sup>) at the heading stage and 4.55 kg/(h·667 m<sup>2</sup>) at the maturity stage, which were 8.8% and 21.6% lower than that in the ecology-adaptive cultivars, respectively.According to the results, a strategy to increase the grain yield of the ecology-adaptive cultivars is suggested: keeping a higher filled grain ratio and a higher 1 000-grain mass, which are able to be accomplished by increasing nitrogen accumulation during the growth period from heading to maturity. Moreover, these methods such as cultivating strong roots and improving root activity are helpful to increase the amount of nitrogen absorption.https://www.academax.com/doi/10.3785/j.issn.1008-9209.2015.07.312riceecological adaptabilitygrain yieldnitrogenaccumulation |
| spellingShingle | LI Min LUO Deqiang JIANG Xuehai ZHOU Weijia GI Guangmei WANG Xuehong LI Shuxing Ecological adaptability of rice cultivars with different types under the low temperature and weak sunshine condition 浙江大学学报. 农业与生命科学版 rice ecological adaptability grain yield nitrogen accumulation |
| title | Ecological adaptability of rice cultivars with different types under the low temperature and weak sunshine condition |
| title_full | Ecological adaptability of rice cultivars with different types under the low temperature and weak sunshine condition |
| title_fullStr | Ecological adaptability of rice cultivars with different types under the low temperature and weak sunshine condition |
| title_full_unstemmed | Ecological adaptability of rice cultivars with different types under the low temperature and weak sunshine condition |
| title_short | Ecological adaptability of rice cultivars with different types under the low temperature and weak sunshine condition |
| title_sort | ecological adaptability of rice cultivars with different types under the low temperature and weak sunshine condition |
| topic | rice ecological adaptability grain yield nitrogen accumulation |
| url | https://www.academax.com/doi/10.3785/j.issn.1008-9209.2015.07.312 |
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