寒旱农业科学2025，Vol.4Issue(2)：117-123,7.DOI:10.3969/j.issn.2097-2172.2025.02.004
水肥耦合对河西冷凉灌区春茬娃娃菜生长和光合特性的影响
Effects of Water and Fertilizer Coupling on Plant Growth and Photosynthetic Properties of Spring Baby Cabbages in the Hexi Cold Irrigation Areas
摘要
Abstract
This study aimed to identify an optimal water and fertilizer management model for spring baby cabbages(Brassica pekinensis)in the Hexi cold irrigation area.Using the local spring baby cabbage variety Cold-resistant Gold Queen as the experimental material,effects of different water-fertilizer combinations on the growth of leaf head and leaf photosynthetic parameters were investigated.Results showed that irrigation capacity,fertilization rate,and water-fertilizer interaction all significantly affected cabbage growth and photosynthetic characteristics,with fertilization rate having the greatest impact,followed by water-fertilizer interaction.Under the same fertilization conditions,as irrigation capacity increased,both the horizontal and vertical diameters of cabbage heads increased significantly,but they began to decrease after reaching a certain threshold.When the irrigation lower limit was controlled at 70%(medium water)and 80%(high water)of the field water holding capacity,the horizontal and vertical diameters of cabbage heads showed an initial increase followed by a decrease as fertilization rate increased.When the fertilization rate was N 330 kg/ha,P2O5 195 kg/ha,and K2O 450 kg/ha,increasing irrigation capacity caused net photosynthetic rate(Pn),stomatal conductance(Cond),and transpiration rate(Tr)to initially increase and then decrease,while intercellular CO2 concentration(Ci)initially decreased and then increased.Under the irrigation level where the lower limit was controlled at 70%of field water holding capacity,increasing the fertilization rate improved the net photosynthetic rate(Pn),stomatal conductance(Cond),and transpiration rate(Tr)of cabbage leaves,while reducing the intercellular CO2 concentration(Ci).As the fertilization rate increased,the net photosynthetic rate(Pn),stomatal conductance(Cond),and transpiration rate(Tr)of the leaves during rosette,head formation,and harvesting stages all showed an initial increase followed by a decrease,while the intercellular CO2 concentration(Ci)initially decreased and then increased.Among the different water-fertilizer coupling models,the medium water and medium fertilizer treatment(irrigation lowerlimit controlled at 70%of field water holding capacity,fertilization of N 330 kg/ha,P2O5 195 kg/ha,and K2O 450 kg/ha)performed the best.The lower water and high fertilizer treatment(irrigation lower limit controlled at 60%of field water holding capacity,fertilization of N 380 kg/ha,P2O5 224 kg/ha,and K2O 518 kg/ha)increased the horizontal and vertical diameters of cabbage heads by 18.72%and 10.98%,respectively,while the center column length decreased by 31.89%.The leaf net photosynthetic rate,stomatal conductance,and transpiration rate increased by 13.10%,27.52%,and 22.26%,respectively,while the intercellular CO2 concentration decreased by 8.07%.Considering the growth conditions and photosynthetic utilization characteristics of baby cabbage,it is concluded that the most suitable water-fertilizer combination model for spring baby cabbage in the Hexi cold irrigation area of Gansu is the irrigation lower limit controlled at 70%of field water holding capacity,with a fertilization rate of N 330 kg/ha,P2O5 195 kg/ha,and K2O 450 kg/ha throughout the growth period.关键词
娃娃菜/水肥耦合/隶属函数/生长/光合特性/河西冷凉灌区Key words
Baby cabbage/Water and fertilizer coupling/Membership function/Growth/Photosynthetic property/Hexi cold irrigation area分类
农业科技引用本文复制引用
马彦霞,陈静茹,牛成达,任亚丽,常涛,张莉..水肥耦合对河西冷凉灌区春茬娃娃菜生长和光合特性的影响[J].寒旱农业科学,2025,4(2):117-123,7.基金项目
国家自然科学基金(32060678) （32060678）
甘肃省自然科学基金(22JR5RA761) （22JR5RA761）
甘肃省农业科学院重点研发计划(2022GAAS26). （2022GAAS26）
