Effects of different mulching materials on nitrate metabolism in soil of apple root-zone in summer and autumn.

• Published in: Ying yong sheng tai xue bao Vol. 27; no. 8; p. 2452
• Main Authors: Zhang, Rui Xue, Yang, Hong Qiang, Xu, Ying, Lyu, Ting Wen, Cao, Hui, Ning, Liu Fang, Zhou, Chun Ran, Fan, Wei Guo
• Format: Journal Article
• Language: Chinese
• Published: China 01.08.2016
• Subjects: straw mat; apple; mulching; nitrate metabolizing; root-zone soil; agricultural carpet
• ISSN: 1001-9332
• DOI: 10.13287/j.1001-9332.201608.014

This study explored the effects of mulching straw mat, agricultural carpet, transparent-plastic film and horticultural fabric on nitrification-denitrification, nitrate reductase (NR), nitrite reductase (NiR), ammonium, nitrate and nitrite nitrogen in root-zone soil grown with three-year old apple trees (Malus domestica cv. Starkrimson) during summer and autumn. Results showed that the four treatments decreased nitrification intensity in summer soil, NiR activity in summer-autumn soil and the variation coefficient of nitrification-denitrification intensity and NR in both summer and autumn soil. The treatments increased the denitrification intensity, NR activity, ammonium nitrogen contents in summer-autumn soil and ammonium nitrogen contents in autumn soil. Straw mat treatment increased denitrification intensity and nitrate nitrogen contents in both summer and autumn soil and decreased the activity of NR and NiR in summer soil. The coefficient of variation of nitrification-denitrification intensity and NR activ