| 摘要: |
| 为探究遮光处理对马铃薯植株光合作用和产量的影响，以12个马铃薯品种原原种为试验材料，苗齐后设置正常光照(CK)、单层遮光网遮盖处理(Z1)、双层遮光网遮盖处理(Z2)，间隔取样测量期为14 d，分别测定叶绿素相对含量(SPAD)、荧光参数(Fv/Fm)、光合生理指标(蒸腾速率Tr、气孔导度Gs、净光合速率Pn和胞间CO2浓度Ci)、单株产量、干物质含量和单株块茎干物质质量。结果表明，遮光处理导致叶片的SPAD下降，部分品种在遮光处理下叶片提早枯萎；遮光处理初期Z1和Z2叶片的Fv/Fm高于CK，而随着处理时间的延长Z1和Z2叶片的Fv/Fm显著低于CK；除‘大西洋’外，其余品种的Tr、Gs和Pn随遮光程度加重而下降但Ci相反，Z2的Pn比CK低12.20%~82.69%、Ci比CK高11.52%~76.55%；且Z1和Z2的单株产量比CK低38.44%~100.00%，Z2的块茎干物质含量比CK低66.88%~100.00%，Z1和Z2的单株块茎干物质质量比CK低42.06%~100.00%。 |
| 关键词: 马铃薯 光照强度 光合作用 荧光参数 产量 |
| DOI：10.11841/j.issn.1007-4333.2022.02.05 |
| 投稿时间：2021-02-09 |
| 基金项目:现代农业产业技术体系建设专项资金资助(CARS-09)；东北农业大学大学生SIPT项目 |
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| Effects of different shading treatments on photosynthesis and yield of potato |
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TANG Xinhua1,WANG Baohuai1,MA Jia1,LI Wei2,ZHANG Lili1,SHI Ying1*
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| (1.Agricultural College, Northeast Agricultural University, Harbin 150030, China;2.College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China) |
| Abstract: |
| To study the effects of shading treatments on the photosynthesis and yield of potato, 12 potato virus-free varieties were taken as experimental materials. After the seedling emergence, the control group(CK)was planted under normal light, treatment Z1 was covered by a single-layer shading net, and treatment Z2 was covered by a double-layer shading net. The sampling interval for was 14 days, and the relative content of chlorophyll(SPAD), fluorescence parameters(Fv/Fm), photosynthetic physiological indexes(transpiration rate Tr, stomatal conductance Gs, net photosynthetic rate Pn and intercellular CO2 concentration Ci), yield per plant, dry matter content and weight of dry matter per plant tuber were measured, respectively. The results showed that: The SPAD of leaves was decreased in treatments Z1 and Z2, and the leaves of some varieties withered earlier. Fv/Fm of the leaves of plants in treatments Z1 and Z2 in the early stage was higher than that of CK, while with the extension of treatment time, the Fv/Fm of leaves of plants in Z1 and Z2 was significantly lower than that of the control. Tr, Gs and Pn of other varieties except “Atlantic” decreased in Z1 and Z2, while Ci was the opposite. Pn of Z2 was significantly lower than that of CK 12. 20%-82. 69%, and Ci was significantly higher than that of CK 11. 52%-76. 55%. Moreover, the yield per plant of Z1 and Z2 was 38. 44%-100. 00% lower than that of CK, the tuber dry matter content of Z2 was 66. 88%-100. 00% lower than that of CK, and the weight of dry matter per tuber of Z1 and Z2 was 42. 06%-100. 00% lower than that of CK. |
| Key words: potato light intensity photosynthesis fluorescence parameters yield |
