Effects of rhizosphere CO2 concentration on potato growth

Abstract

Abstract: With the method of areoponics,this paper established a rhizosphere gas environment research system to study the effects of different rhizosphere CO₂ concentration on the growth of potato(Solanum tuberosum)plants.The results showed that in treatments 380 and 380～920 μmol CO₂·mol^-1,the plant height,stem diameter,leaf area,root length,and individuals of stolon and mini-tuber had a similar variation trend with time,and presented two distinct phases.The plants grew vigorously,and their tuber yield increased markedly,compared with treatment 3 600 μmol CO₂·mol^-1,which indicated that 380～920 μmol CO₂·mol^-1 was the appropriate CO₂ concentration in the root zone to promote potato growth,while overmuch rhizosphere CO₂ would markedly inhibit the growth and development of potato plants.Treatment 3 600 μmol CO₂·mol^-1 and sand culture had the similar stem diameter,leaf area,and individuals of stolon and mini-tuber.The plants grew short and weak,and tuber yield was lower.

Key words: Potato, Areoponics, Rhizosphere CO₂ treatment

CLC Number:

Q948.15

SUN Zhouping, LI Tianlai, FAN Wenli . Effects of rhizosphere CO₂ concentration on potato growth[J]. Chinese Journal of Applied Ecology, 2005, 16(11): 2097-2101.

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Effects of rhizosphere CO₂ concentration on potato growth

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