Phytomass input and nutrient cycling under different management systems in dwarf cashew cultivation
| Autor: | José Ferreira Lustosa Filho, Teógenes Senna de Oliveira, Júlio César Lima Neves, João Paulo Bezerra Saraiva, Eduardo de Sá Mendonça, Gislane Mendes de Morais, Helon Hébano de Freitas Sousa |
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| Rok vydání: | 2020 |
| Předmět: |
Canopy
chemistry.chemical_classification Nutrient cycle Agriculture (General) nutrient cycling 04 agricultural and veterinary sciences Root system Perennial crop S1-972 Nutrient Agronomy chemistry Productivity (ecology) 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Organic matter perennial crops spontaneous plants |
| Zdroj: | Revista Brasileira de Ciência do Solo v.44 2020 Revista Brasileira de Ciência do Solo Sociedade Brasileira de Ciência do Solo (SBCS) instacron:SBCS LOCUS Repositório Institucional da UFV Universidade Federal de Viçosa (UFV) instacron:UFV |
| ISSN: | 1806-9657 |
| DOI: | 10.36783/18069657rbcs20200034 |
| Popis: | Rational management of spontaneous plants is an alternative for increasing productivity in tree crops. This study aimed to evaluate the impact of management systems between rows and under the canopy of early dwarf cashew trees on the soil chemical properties and light-fraction organic matter and cashew root systems; we also evaluated the nutrient inputs from the spontaneous plants phytomass and cashew leaves deposited on an Arenic Kandiustults. The management systems under study were disc harrowing (DH) and mechanical mowing (MM) between rows, both with clearing under the cashew canopy (crowning), and herbicide (HERB) between the rows and under the canopy (without crowning). Soil and plant samples (leaves, stems, and roots) were collected at three points: under the canopy, at the canopy projected limit, and between the rows of cashew plants, all after seven years of conducting the experiment. Soil samples collected at the layers of 0.00-0.05, 0.05-0.10, 0.10-0.20, and 0.20-0.30 m were evaluated for total organic carbon, light-fraction organic matter, and chemical attributes. Dry matter, Na, Ca, Mg, N, P, and K were determined in the spontaneous-plant phytomass from under the canopy, at the canopy projected limit, and between the rows. Results showed that between rows of cashew trees there are higher phytomass input and increases in the light fraction of organic matter, pH and Mg2+ in the soil in the treatment MM. Not removing crop residues or spontaneous plants by crowning promoted accumulation of organic material and higher contents of nutrients under the canopy. The management of spontaneous plants and also soil surface under the canopy of the cashew plants had a great influence on productivity. The crowning, used in MM and DH, led to lower productivity, 1,171.87 and 594.97 kg ha-1, respectively, when compared with the absence of crowning (HERB), which resulted in productivity of 1,363.80 kg ha-1. The practice of crowning is not recommended for soil management systems in dwarf cashew crops. |
| Databáze: | OpenAIRE |
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