Integrated Management of K -Additives to Improve the Productivity of Zucchini Plants Grown on a Poor Fertile Sandy Soil
Tolba, M., Farid, I., Siam, H., Abbas, M., Mohamed, I., Mahmoud, S., El-Sayed, A. (2021). Integrated Management of K -Additives to Improve the Productivity of Zucchini Plants Grown on a Poor Fertile Sandy Soil. EKB Journal Management System, 61(3), 355-365. doi: 10.21608/ejss.2021.99643.1472
Mona Tolba; Ihab M Farid; Hanan Siam; Mohamed H.H. Abbas; Ibrahim Mohamed; Safaa Mahmoud; Abo El-Kair El-Sayed. "Integrated Management of K -Additives to Improve the Productivity of Zucchini Plants Grown on a Poor Fertile Sandy Soil". EKB Journal Management System, 61, 3, 2021, 355-365. doi: 10.21608/ejss.2021.99643.1472
Tolba, M., Farid, I., Siam, H., Abbas, M., Mohamed, I., Mahmoud, S., El-Sayed, A. (2021). 'Integrated Management of K -Additives to Improve the Productivity of Zucchini Plants Grown on a Poor Fertile Sandy Soil', EKB Journal Management System, 61(3), pp. 355-365. doi: 10.21608/ejss.2021.99643.1472
Tolba, M., Farid, I., Siam, H., Abbas, M., Mohamed, I., Mahmoud, S., El-Sayed, A. Integrated Management of K -Additives to Improve the Productivity of Zucchini Plants Grown on a Poor Fertile Sandy Soil. EKB Journal Management System, 2021; 61(3): 355-365. doi: 10.21608/ejss.2021.99643.1472

Integrated Management of K -Additives to Improve the Productivity of Zucchini Plants Grown on a Poor Fertile Sandy Soil

Egyptian Journal of Soil Science
Article 9, Volume 61, Issue 3, November 2021, Page 355-365  XML PDF (295.65 K)
Document Type: Original Article
DOI: 10.21608/ejss.2021.99643.1472
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Authors
Mona Tolbaorcid 1; Ihab M Farid2; Hanan Siam1; Mohamed H.H. Abbas email orcid 3; Ibrahim Mohamed4; Safaa Mahmoud1; Abo El-Kair El-Sayed5
1Plant Nutrition Department, National Research Centre, Dokki, Giza, Egypt
2Benha University, Faculty of Agriculture, Soils and Water Department
3Benha University, Faculty of Agriculture, Soils and Water department
4Soils and Water, Faculty of Agric., Benha University
5Algal Biotechnology Unit, Fertilization Technology Department, National Research Centre, Dokki-Cairo, Egypt
Abstract
Three eco-friendly approaches were investigated for their effects on improving K-uptake by zucchini plants; hence, increasing shoot growth and fruit productivity. These approaches were: (1) amending soil with biochar (0 and 5g kg-1), (2) spraying plants with Amphora extract (0 and 1g L-1) and (3) substituting inorganic-K fertilizers partially with organic ones. In this concern, five levels of compost (0, 1.5, 3, 4.5 and 6 g kg-1) were applied to a poor fertile sandy soil (98.5% sand) in complementation with inorganic NPK-fertilizers to bring their concentrations, even in the control treatment, to the recommended levels. This investigation was conducted under the greenhouse conditions during the summer season of 2020. Results obtained herein reveal that application of either of biochar or Amphora extract exhibited positive effects on soil available-K (20 and 6.5% respectively), K-concentrations in fruits and total K-uptake by the aboveground plant parts. Furthermore, these two amendments raised considerably the dry weights of both zucchini shoots and fruits. On the other hand, compost could partially substitute inorganic-K fertilizers when it was applied at a rate not exceeding 3g kg-1, recording significant improvements in all the investigated parameters. Nevertheless application of high compost doses reduced significantly fruit yield. Generally, there existed a highly significant linear relation between the total K-uptake by plants and fruit dry weights. Accordingly, treatments that improved considerably K-uptake by plants (the combination between foliar application of amphora extract + 5 g kg-1 biochar + 0-3 g kg-1 compost) recorded the highest improvements in productivity of zucchini plants.
Keywords
Potassium; Zucchini; Amphora extract; Biochar; Compost
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