Soil fertility and fine root distribution after gypsum application in Eucalyptus plantations with different tolerance to
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Soil fertility and fine root distribution after gypsum application in Eucalyptus plantations with different tolerance to water deficit Yesid Alejandro Mariño Macana1 · Fábio Henrique Silva Floriano de Toledo2 · Alexandre de Vicente Ferraz3 · José Leonardo de Moraes Gonçalves1 · Sandra Milena Díaz López4 · Camilo Andrés Barrero Cubillos5 · Ángela Nathalia Sierra Rojas5 · Hélder Andrade Bolognani1 Received: 2 June 2019 / Accepted: 14 January 2020 © Springer Nature B.V. 2020
Abstract Most Eucalyptus plantations in Brazil are located in regions with low fertility soils and seasonal droughts. The main objectives of the present study were to evaluate the fine root distribution of Eucalyptus along the soil profile and the vertical distribution of Ca, Mg, S, and K in the soil in response to dolomitic limestone and gypsum application under severe water deficit conditions. The experiment was designed in randomized blocks. Two clones of the hybrid Eucalyptus urograndis (one clone was tolerant to water deficit and one clone was susceptible to water deficit) were used under two crop conditions (with and without gypsum application). Fine root density (FRD) and root length density (RLD) decreased gradually along the soil profile. Gypsum application increased RLD in some soil layers in the tolerant clone. The Ca, Mg, and S-SO42− content of the soil increased in both clones. Both clones showed an increase in wood volume in response to gypsum application. The Ca, Mg, and S-SO42− content of the soil increased in both clones. Both clones showed an increase in wood volume in response to gypsum application. At 46 months after planting, the wood volume increased by 17% in the susceptible clone and by 24% in the tolerant clone. The use of soil conditioners, such as gypsum and limestone, is important to improve soil fertility and root distribution for both clones, especially in a prolonged drought season. Keywords Calcium · Drought · Fine root length · Exchangeable bases in soil
Hélder Andrade Bolognani: Deceased 13 December 2017. * Yesid Alejandro Mariño Macana [email protected] Extended author information available on the last page of the article
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New Forests
Introduction Severe water deficit is characteristic of the Brazilian savanna (Cerrado) in the north of Minas Gerais State, where there is a prolonged drought season from May to September. Thus, for forestry production in this region, water and nutrient availability are important conditions that determine the efforts required to provide the appropriate nutritional supplements. Water supply is a key resource determining levels of plantation productivity (Stape et al. 2010). The purpose of liming in eucalypt (Eucalyptus spp.) plantations are to manipulate the g2+, to obtain higher yields and to avoid deficiencies pH of soils and to provide C a2+ and M of these nutrients. Exhaustion of these nutrient in soil can be an issue, especially for C a2+, −1 which is removed in harvest (approximately 175 kg ha in a 7-years rotation) (Smethurst 2010; Gonçal
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