Comparison of three comprehensive evaluation methods to evaluate thegrape rootstock-scion combination environmental adaptability

Abstract: 【Objective】Using three kinds of evaluate methods including principal component analysis, entropy evaluation method and topsis method to evaluate different rootstock-scions combinations’environmental adaptability. And comparing the difference between the three evaluation methods, then selecting akind of suitable method to evaluate the environmental adaptability of nine kinds of rootstock-scion combinations.【Methods】By measuring ‘87-1’ grape different rootstock-scion combinations environmentaladaptability indicators such as apparent quantum yield, light combination point, dark respiration rate, car⁃boxylation efficiency, carbon dioxide combination point, net photosynthetic rate in high temperature andso on, and using principal component analysis, entropy evaluation method and topsis method to evaluatetheir environmental adaptability, respectively. These rootstock-scion combinations include‘87-1’‘/ Be⁃ta’,‘87-1’/1103P,‘87-1’/101-14,‘87-1’/3309C,‘87-1’/140Ru,‘87-1’/5C,‘87-1’/SO4,‘87-1’/‘Huapu No.1’as well as‘87- 1’‘/ Kangzhen No.1’rootstock- scions combinations. Their spac⁃ing in the rows and spacing between rows are 2.5 m×4.0 m, double plant colonization, oblique dry horizontal dragon shape with horizontal curtain, taking the integration of water and fertilizer, and other manage⁃ments are routine. Trees were planted in grape center technology demonstration areas of Fruit Research In⁃stitute of Chinese Academy of Agricultural Sciences (Xingcheng, Liaoning province. What’s more, choos⁃ing the cloudless morning, using Li-6400 Photosynthesis instrument to measure the light response curves,carbon response curves and temperature response of different rootstock-scions combinations’optimalfunction leaf. The select of optimal function leaf is by using Li-6400 Photosynthesis instrument to mea⁃sure some function leaves of different rootstock-scions combinations, then chose the leaves with the larg⁃est net photosynthetic rate. After finding optimal function leaves, then began to measure three kinds of re⁃sponse curves. First of all, the carbon dioxide concentration is set 400 μmol·mol^-1, temperature is set 25 ℃, gas velocity is set 500 mmol·s^-1, photosynthetically active radiation is set 2 000, 1 800, 1 500,1 200, 800, 400, 200, 100, 50, 20, 0 μmol·m^-2 ·s^-1 from strong to weak, then measuring light responsecurve. Secondly, photosynthetically active radiation is set 1 200 μmol·m^-2·s^-1, temperature is set 25 ℃,gas velocity is set 500 mmol·s^-1, carbon dioxide concentration is set 2 000, 1 800, 1 500, 1 200, 1 000,800, 400, 400, 200, 150, 100, 50, 20 μmol·mol^-1 from high to low, then measuring carbon dioxide response curve. Finally, photosynthetically active radiation is set 1 200 μmol·m^-2·s^-1, carbon dioxide concentration is set 400 μmol·mol^-1, gas velocity is set 500 mmol·s^-1, temperature is set 22, 25, 27, 30, 32,35 ℃ from low to high, then measuring net photosynthetic rate. After obtain the data, employing right angle hyperbolic correction model to obtain apparent quantum yield, light combination point, carboxylation efficiency, carbon dioxide combination point, dark respiration rate. Comparing and analyzing thethree kinds of comprehensive methods, selecting a kind of suitable methods to evaluate nine kinds of root⁃stock-scion combinations environmental adaptability.【Results】The results show when use entropy evalu⁃ation method to evaluate‘87-1’‘/ Kangzhen No.1’rootstock-scion combination environmental adaptabil⁃ity is the best,‘87-1’/5C,‘87-1’/SO4,‘87-1’/1103P rootstock-scion combinations are inferior to‘Kangzhen No.1’combination, the worst rootstock-scion combination is‘87-1’‘/ Huapu No.1’combina⁃tion. When use principal component analysis method to evaluate,‘87-1’/3309C rootstock-scion combi⁃nation environmental adaptability is also the best.‘87-1’‘/ Huapu No.1’,‘87-1’‘/ Beta’,‘87-1’/SO4rootstock-scion combinations environmental adaptability are inferior to‘87-1’/3309C rootstock-scioncombination.‘87-1’/101-14 rootstock-scion combination environmental adaptability is the worst. Whenuse topsis method to evaluate,‘87-1’/3309C rootstock-scion combination environmental adaptability isthe best,‘87-1’/5C,‘87-1’/101-14,‘87-1’‘/ Beta’rootstock-scion combinations environmental adapt⁃ability are inferior to‘87-1’/3309C rootstock-scion combination.‘87-1’‘/ Kangzhen No.1’rootstockscioncombination is the worst. The difference of three evaluation methods mainly depend on their weightdifference, method theoretical difference. In the evaluation of grape rootstock-scion combination environ⁃mental adaptability, because the environmental adaptability parameter data are not many, and they arestrong professional, some important parameters discrete degree are small, topsis method is more suitablefor the experimental data evaluation.【Conclusion】Topsis methods is better than principal component analysis and entropy evaluation method when it come to more evaluating‘87-1’grape rootstock-scions combinations’environmental adaptability. And‘87-1’/3309C rootstock-scion combination environmentaladaptability is the best in the nine kinds of rootstock-scion combination.