In order to understand the mechanism of hydraulic conductivity, water transmission and the effect of water and nitrogen on varieties of fruit treesthe effects of different soil water and nitrogen treatments on growth and hydraulic conductivity of fruit tree seedlings were conducted
by barrel experiments. Peach (Prunus persica (L.) Batsch), pearPyrus sppand appleM. pumila Millseedlings were used as experimental materials. The values of hydraulic conductivity of fruit tree seedlings were measured with high pressure flow meter (HPFM, US Dynamax Company). The results showed
that there were significantly differences on growth of fruit tree seedlings under different water and nitrogen treatments. Soil moisture had significant effects on root and crown hydraulic conductivity. Hydraulic conductivity decreased with the decreasing of soil moisture. Soil droughts limited
the growth and biomass accumulation of the roots of the fruit tree seedlings, so the values of hydraulic conductivity of root and crown were decreased. Nitrogen also had significant effects on the hydraulic conductivity of fruit tree seedlings. Nitrogen fertilizer application could increase
the hydraulic conductivity of root and crown of fruit tree seedlings. There are liner correlations between hydraulic conductivity and root diameter of fruit tree seedlings, height and root diameter of fruit tree seedlings under experimental conditions.
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Keywords:
fruit tree seedlings;
growth;
hydraulic conductivity;
nitrogen fertilizer;
soil moisture
Document Type: Research Article
Publication date:
01 June 2009
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Transations of the Chinese Society of Agricultural Engineering(TCSAE), founded in 1985, is sponsored by the Chinese Chemical Society. TCSAE has been indexed by EI Compendex, CAB Inti, CSA. TCSAE is devoted to reporting the academic developments of Agricultural Engineering mainly in China and some developments from abroad. The primary topics that we consider are the following: comprehensive research, agricultural equipment and mechanization, soil and water engineering, agricultural information and electrical technologies, agricultural bioenvironmental and energy engineering, land consolidation and rehabilitation engineering, agricultural produce processing engineering.
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