| Effect of planting density on population quality, chlorophyll fluorescence parameters and yield of wheat |
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| DOI：10.7606/j.issn.1000-7601.2014.05.016 |
| Key Words: density dry matter weight chlorophyll chlorophyll fluorescence yield |
| Author Name | Affiliation | | ZHANG Xiang-qian1,2, DU Shi-zhou1,2, CAO Cheng-fu1,2, QIAO Yu-qiang1,2, ZHAO Zhu1,2, ZHANG Yao-lan1,2 | (1.安徽省农业科学院作物研究所, 安徽 合肥 230031； 2.安徽省农作物品质改良重点实验室, 安徽 合肥 230031) |
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| Abstract: |
| To further improve the wheat population quality, the differences in main physiological indexes and yield of Wanmai 52 and Yannong 19 under different planting densities were investigated. The results showed that the leaf area index of Yannong 19 was higher than that of Wanmai 52 under basic seedling 120×104 plant·hm-2 (M1) and 210×104 plant·hm-2 (M2
), while was lower than that of Wanmai 52 under 300×104 plant·hm-2 (M3) and 390×104 plant·hm-2(M4). The chlorophyll content at each growth stage and each chlorophyll fluorescence parameter (Fo、Fm、Fv/Fm、qP、ETR and ΦpsII) at filling stage of Wanmai 52 and Yannong 19 were decreased with the increasing of planting density, and the difference between the two wheat varieties was insignificant under the same planting density. The yield of Wanmai 52 and Yannong 19 had a change trend of first increased and then decreased with the increasing of planting density, the yield of Yannong 19 was higher than that of Wanmai 52 under M1 and M2, and increased by 13.4％ and 2.4％ respectively, while under M3 and M4, the yield of Wanmai 52 was higher than that of Yannong 19, and increased by 10.7％ and 1.0％ respectively. The economic coefficient of Wanmai 52 and Yannong 19 was decreased with the increasing of planting density, and there were some differences between the two varieties, but under the same planting density was insignificant. Correlation analysis revealed that the actual photochemical efficiency (ΦpsII) of wheat leaves were positively correlated to dry matter weight per stem, chlorophyll content with the shape of a straight line; the leaf area index was negatively correlated to dry matter weight per stem with the shape of a straight line, and had a parabolic relationship with yield. All the findings demonstrated that the suitable planting density of Yannong 19 was the basic seedling 120×104～210×104 plant·hm-2, and Wanmai 52 was 210×104～300×104 plant·hm-2. |
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