首页|Effect of different dwarfing interstocks on the vegetative growth and nitrogen utilization efficiency of apple trees under low-nitrate and drought stress
Effect of different dwarfing interstocks on the vegetative growth and nitrogen utilization efficiency of apple trees under low-nitrate and drought stress
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NSTL
Elsevier
? 2022 Elsevier B.V.We developed apple plants that are better adapted to growth in high-density orchards in dry areas with low-nutrient soil. One-year-old ‘Fuji’ apple cultivar ‘Tianhong 2’ on ‘Malus. robusta’ rootstock was cultivated with ‘SH40’, ‘Jizhen 1’, or ‘Jizhen2’ dwarfing rootstock as an interstock bridge to investigate the effects on vegetative growth and nitrogen utilization efficiency under different water and nitrate conditions. The results showed reductions in several growth indices, including plant height, trunk diameter, total dry weight, relative growth rate, chlorophyll content, and net photosynthesis rate, for all interstocks under low-nitrate and drought conditions. The smallest reductions occurred with ‘SH40’ and the highest with ‘Jizhen2’. When subjected to drought, ‘SH40’ showed the minimum and ‘Jizhen2’ the maximum reduction in 15N accumulation and utilization. Additionally, ‘SH40’ had the highest nitrogen content and uptake flux, regardless of the nitrogen level. These findings suggest that the high tolerance of ‘SH40’ to drought and low-nitrogen stress recommend its use as an interstock.
NSTL
Elsevier
