EFFECT OF DRIP IRRIGATION AND NITROGEN FERTILIZATION ON: 11- THE LEAF WATER STATUS, BIOCHEMICAL ASPECTS AND MINERAL CONTENTS OF "ANNA" APPLE TREES GROWN IN NEW RECLAIMED SOILS | ||||
| Journal of Plant Production | ||||
| Article 22, Volume 27, Issue 4, April 2002, Page 2411-2429 PDF (5.74 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2002.253991 | ||||
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| Authors | ||||
| A. H. Shahein,1; M. B. EI-Sabrout1; M. M. Yehia2; W. M. Abd EI-Messeih1 | ||||
| 1Department of Pomology, Faculty of Agriculture, Alexandria University, Alexandria, Egypt. | ||||
| 2Horticulture Research Institute, ARC, Giza, Egypt. | ||||
| Abstract | ||||
| The present investigation was carried out in 1997 , 1998 , 1999 seasons on 5-years old "Anna" apple trees budded on MM. 106 rootstock and grown in a loamy sand soil at Desert Development Center (DOC) of the American University in Cairo (AUC) Sadat Research Station (SRS), EI-Menofeya Governorate. The goal of this work was to study the effect of four irrigation treatments and three nitrogen levels on the leaf water status, biochemical aspects and mineral contents. The amount of irrigation water applied to each tested tree based on soil-matrix-potential in the three irrigation treatments (11 , 12 and b) , and the control treatment. The main results can be summarized in the following points: 1- Relative water content (RWC) in the leaves significantly decreased with decreasing irrigation rate, whereas N level had no significant effect on RWC. 2- The total chlorophyll content of the leaves significantly increased with increasing irrigation rate and nitrogen fertilization level. 3- Decreasing the quantity of irrigation water applied to each tree caused a significant increase in free leaf proline content especially in la . In addition, there is no significant effect of N levels on the free leaf proline content generally. 4- Increasing irrigation rate and N level increased leaf N, P, Ca and Fe but decreased leaf Mn and Zn in the three seasons of study. 5- Increasing irrigation rate also increased leaf K and decreased leaf Mn and Cu, whereas increasing N level increased leaf Cu but decreased leaf Mn and Zn in the three seasons. 6- Increasing water stress evidently depressed leaf Fe content but significantly raised the concentration of leaf Mn, Zn and Cu in all three seasons. Nitrogen level significantly affected leaf Fe and Cu contents positively but had a negative effect on leaf Mn and Zn contents. | ||||
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