[ Objective] The paper was to discuss the incidence regularity of Chinese cabbage tip-burn. [ Method] With five Chinese cabbage varieties bred by Zhengzhou Vegetable Research Institute and Beijing Xinsanhao as materia...[ Objective] The paper was to discuss the incidence regularity of Chinese cabbage tip-burn. [ Method] With five Chinese cabbage varieties bred by Zhengzhou Vegetable Research Institute and Beijing Xinsanhao as materials, the incidence regularity of tip-burn was studied using Chinese cabbage tip-burn identification method at seedling stage. [ Result] The disease index of tip-burn generally increased with the prolongation of culture time, but all varieties successively reached high susceptibility state at 45 d of calcium deficiency culture, and the disease basically reached a stable state at 55 d. Zhengbai 65 showed the best resist- ance in calcium deficiency treatment, while Zhengbai 4 displayed the worst tolerance and was very sensitive to calcium deficiency, with poor buffering capacity. Zhengbai 80 performed good buffering capacity in the early stage of calcium deficiency, but with the prolongation of culture time, the incidence developed rapidly in late stage. Other varieties showed different resistance and sensitivity, but they reached the stable incidence period almost at the same time point. [ Conclusion] The results provided a reference for prevention and control of tip-burn.展开更多
The representative samples were selected from Yuzong 5,and the methods of field planting and indoor measuring were employed for investigation and data processing on 894 plants of Yuzong 5.The results showed that the c...The representative samples were selected from Yuzong 5,and the methods of field planting and indoor measuring were employed for investigation and data processing on 894 plants of Yuzong 5.The results showed that the coefficients of variation about some traits of 894 plants were as follows: ear height(19.9%); panicle weight(35.1%); ear length(18.1%); ear row number(19.7%); number of kernels per row(22.5%); grain weight per panicle(36.3%); ear diameter(11.1%).It was found that there was large variation in these traits for various plants which could represent Yuzong 5 for glutinous variety improvement.展开更多
文摘[ Objective] The paper was to discuss the incidence regularity of Chinese cabbage tip-burn. [ Method] With five Chinese cabbage varieties bred by Zhengzhou Vegetable Research Institute and Beijing Xinsanhao as materials, the incidence regularity of tip-burn was studied using Chinese cabbage tip-burn identification method at seedling stage. [ Result] The disease index of tip-burn generally increased with the prolongation of culture time, but all varieties successively reached high susceptibility state at 45 d of calcium deficiency culture, and the disease basically reached a stable state at 55 d. Zhengbai 65 showed the best resist- ance in calcium deficiency treatment, while Zhengbai 4 displayed the worst tolerance and was very sensitive to calcium deficiency, with poor buffering capacity. Zhengbai 80 performed good buffering capacity in the early stage of calcium deficiency, but with the prolongation of culture time, the incidence developed rapidly in late stage. Other varieties showed different resistance and sensitivity, but they reached the stable incidence period almost at the same time point. [ Conclusion] The results provided a reference for prevention and control of tip-burn.
基金Supported by Natural Science Foundation of Hainan(20153094)
文摘The representative samples were selected from Yuzong 5,and the methods of field planting and indoor measuring were employed for investigation and data processing on 894 plants of Yuzong 5.The results showed that the coefficients of variation about some traits of 894 plants were as follows: ear height(19.9%); panicle weight(35.1%); ear length(18.1%); ear row number(19.7%); number of kernels per row(22.5%); grain weight per panicle(36.3%); ear diameter(11.1%).It was found that there was large variation in these traits for various plants which could represent Yuzong 5 for glutinous variety improvement.
