Available Online: http://www.ejpau.media.pl/volume17/issue3/abs-05.html
EFFECT OF LONG-TERM APPLE-TREE CULTIVATION AND CULTURAL PRACTICES IN THE ORCHARD AFTER REPLANTATION ON THE CONTENTS OF INDOLE-3-ACETIC ACID AND CHEMICAL COMPOUNDS
Institute for Agricultural and Forest Environment, Polish Academy of Sciences, Poznań, Poland
In this study effect of long-term apple-tree cultivation and
cultural practices as fertilization and irrigation performed in the orchard after
replantation on the level of indole-3-acetic acid (IAA), total organic carbon
(TOC), hot water extractable organic carbon (CHWE), total nitrogen
(N-total), ammonium (N-NH4+) and nitrate (N-NO3–)
ions in the soil was investigated. In the experiment, three irrigation and three
fertilization levels were used. The amounts of IAA, TOC, CHWE, N-total,
N-NH4+ and N-NO3– in soil almost
always depended on the sampling period. Between fertilized and irrigated combinations
originating from apple-tree orchard after replantation and Nowina there have
not been confirmed differences in the contents of indole-3-acetic acid, hot water
extractable organic carbon, N-total and ammonium ions. Plant cultivation for
many years on the same site has not had a negative effect on the concentrations
of these parameters in the orchard. Furthermore, the concentration of total organic
carbon and yield of apple-tree cultivated after replantation was significantly
lower, in comparison with locality after previous agricultural use (Nowina).
The differences have been demonstrated in the amount of total organic carbon,
hot water extractable organic carbon, N-total and pH among fertilized combinations
of soil in the apple-tree orchard after replantation. Moreover, different levels
of fertilizer had no significant effect on the content of indole-3-acetic acid,
ammonium and nitrate ions in the soil and yield of fruits. The applied irrigation
levels (-0.03 MPa, -0.01 MPa) exert an significant impact on the decrease of
indole-3-acetic acid, hot water extractable organic carbon, ammonium and nitrate
ions in the soil and yield of fruits in replanted orchard.
Key words: apple-tree cultivation, chemical compounds, fertilization, indole-3-acetic acid, irrigation, replantation.
Institute for Agricultural and Forest Environment,
Polish Academy of Sciences, Poznań, Poland
Phone: (+48) 61 8475601
60-809 Poznań, Poland
Responses to this article, comments are invited and should be submitted within three months of the publication of the article. If accepted for publication, they will be published in the chapter headed 'Discussions' and hyperlinked to the article.