Search

Soil salinity is a significant abiotic stress and poses risks to environmental sustainability. Thus, the improvement of the time for recovering the salt-affect soil is crucial for the phytoextraction process using halophytes plants, especially regarding on nutritional management. We evaluated the responses of Atriplex nummularia Lindl. to nitrogen (N) and phosphorus (P) under different salinity levels. The treatments comprised doses of N (N1 = 80 kg ha−1) and P (P1 = 60 kg ha−1): (1) without N and P (N0P0) (control); (2) with N and without P (N1P0); (3) without N and with P (N0P1); and (4) with N and P (N1P1) and five levels of electrical conductivity from irrigation water: 0.08, 1.7, 4.8, 8.6, and 12.5 dS m−1. The. We evaluated dry biomass of leaves, stems, and roots 93 days after transplantation. We also assessed the leaf and osmotic water potential, the osmotic adjustment, and the nutrient contents (N, P, Na, and K). N application increased 22.3, 17.8, and 32.8% the leaf biomass, stem biomass, and osmotic adjustment, respectively; and consequently, boosts Na extraction in 27.8%. Thus, the time of the phytoextraction process can be improved with N fertilizer at a rate of 80 kg ha−1. NOVELTY STATEMENT: Very few studies have investigated the nutrient dynamics responses in Atriplex species in salt-affected soils; thus, this study represents a novelty. We tested the management of nitrogen (N) and phosphate (P) fertilizers to increase crop yield and optimize the phytoextraction process in salt-affected soils. We believe our results contribute to the improvement of the knowledge of this relevant topic, mainly in terms of the recovery of areas degraded by salinity. There is a paucity of studies associating salinity and nutritional management of soils worldwide. [ABSTRACT FROM AUTHOR]

Copyright of Agricultural Research in the Tropics / Pesquisa Agropecuária Tropical is the property of Pesquisa Agropecuaria Tropical and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Soil structure has a significant impact on sugarcane production. This research evaluated the effects of controlled traffic on soil physical quality (SPQ). The following four management systems (MS) were evaluated: rainfed sugarcane cultivation and the application of vinasse (RV); irrigated sugarcane cultivation (I); irrigated sugarcane cultivation and application of vinasse (IV), and native vegetation (no sugarcane or irrigation; NV) as a reference. Soil samples were collected within sugarcane rows (WR) and between rows (BR) (used exclusively for agricultural machinery traffic) from mini-trenches for visual evaluation of soil structure (VESS) based on a scale from 1 to 5. Disturbed and undisturbed soil samples were collected for measuring indicators of SPQ.All SPQ variables differed (p < 0.05) between WR and BR, demonstrating the efficiency of controlled machinery traffic for SPQ. None of the managements systems reached the critical limit of 2.0 MPa for soil resistance penetration. The average of saturated hydraulic conductivity for WR were 220.2 mm h−1, 126.8 mm h−1, and 49.4 mm h−1 to IV, I e RV, respectively. SPQ followed the order: NV > IV > I > RV. The VESS was efficient for estimating SPQ and the scores were below 3.0 in all crop management systems. [ABSTRACT FROM AUTHOR]

Copyright of Revista Ciência Agronômica is the property of Revista Ciencia Agronomica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)