Plant Soil Environ., 2011, 57(11):493-498 | DOI: 10.17221/38/2011-PSE

Effects of root pruning on physico-chemical characteristics and biological properties of winter jujube rhizosphere soil

S.J. Yang1, Z.Y. Du2, Y. Yu1, Z.L. Zhang1, X.Y. Sun1, S.J. Xing2
1 Yantai Institute, China Agricultural University, Yantai, Shandong, P.R. China
2 Shandong Forestry Academy, Jinan, Shandong, P.R. China

The root system of six-year-old winter jujube (Zizyphus jujuba Mill. cv. Zhanhua) trees were manually pruned at 3, 5 or 7 times trunk diameter distance along both inter-row sides, to study the effects of root pruning on physico-chemical characteristics and biological properties of winter jujube rhizosphere soil. The results showed that the root pruning of 3 and 5 times trunk diameter distance increased the available nitrogen, phosphorus, potassium[concentrations and pH values in the rhizosphere soil and decreased organic matter concentrations, the contents of amino acids, organic acids and total sugars in the root exudates, the populations of bacteria, actinomyces and fungi, and inhibited the activities of catalase, invertase and urease enzymes in contrast to the control in early stage when root pruning was applied. The determined indexes presented a reverse trend as those in early stage after new roots appeared. Compared to the control, the trees by root pruning had higher pesticides residues of the rhizosphere soil in the whole experiment. No differences were noticed between 7 times trunk diameter distance and the control. It is proposed that root pruning had greater impacts on physico-chemical characteristics and biological properties of the rhizosphere soil depending on root pruning intensity.

Keywords: nutrient; soil enzyme; root exudates; microorganism; pH; pesticide residue

Published: November 30, 2011  Show citation

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Yang SJ, Du ZY, Yu Y, Zhang ZL, Sun XY, Xing SJ. Effects of root pruning on physico-chemical characteristics and biological properties of winter jujube rhizosphere soil. Plant Soil Environ. 2011;57(11):493-498. doi: 10.17221/38/2011-PSE.
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