Water and nutrient productivity in melon crop by fertigation under subsurface drip irrigation and mulching in contrasting soils [Produtividade da água e de nutrientes em melão fertirrigado por gotejamento subterrâneo sob mulching em diferentes tipos de solo]
Monteiro R.O.C.,Federal University of Rio Grande do Sul |
Coelho R.D.,University of Sao Paulo |
Monteiro P.F.C.,Fundacao Estadual de Pesquisa Agropecuaria do Rio Grande do Sul FEPAGRO
Ciencia Rural | Year: 2014
Cropping intensification and technical, economic and environmental issues require efficient application of production factors to maintain the soil productive capacity and produce good quality fruits and vegetables. The production factors, water and NPK nutrients, are the most frequent limiting factors to higher melon yields. The objective of the present study was to identify the influence of subsurface drip irrigation and mulching in a protected environment on the water and NPK nutrients productivity in melon cropped in two soil types: sandy loam and clay. The melon crop cultivated under environmental conditions with underground drip irrigation at 0.20m depth, with mulching on sandy loam soil increased water and N, P2O5 and K use efficiency.
Fior C.S.,Fundacao Zoobotanica Do Rio Grande Do sul |
Brentano A.M.,Fundacao Estadual de Pesquisa Agropecuaria Do Rio Grande Do sul FEPAGRO |
Sampaio J.A.T.,Fundacao Estadual de Pesquisa Agropecuaria Do Rio Grande Do sul FEPAGRO |
Rodrigues L.R.,Fundacao Estadual de Pesquisa Agropecuaria Do Rio Grande Do sul FEPAGRO
Iheringia - Serie Botanica | Year: 2011
Siphocampylus betulifolius (Cham.) G. Don has the potential for indoor decoration, especially for presenting continuous flowering in partially shaded places. A sequence of experiments was carried out in order to identify the conditions to its in vitro propagation. Micropropagation was executed in MS medium with 70% of the composition of salts and vitamins, and with 30 g.L -1 of sucrose, 7.5 g.L -1 of agar and pH adjusted to 5.8 with different concentrations of naphthaleneacetic acid (ANA) and benzyladenine (BAP) in each step. The induction of nodal segments in 0.1 mg ANA and 0.5 to 1.5 mg.L -1 of BAP was satisfactory. Multiplication was made with 0.5 mg.L -1 of BAP. Rooting was significantly higher with 1 mg.L -1 of ANA and 48% of the plants survived to acclimatization under intermittent nebulization. We concluded that the propagation of Siphocampylus betulifolius can be accomplished through nodal segments cultured in vitro.
Fermino M.H.,Fundacao Estadual de Pesquisa Agropecuaria do Rio Grande do Sul FEPAGRO |
Trevisan M.,Fundacao Estadual de Pesquisa Agropecuaria do Rio Grande do Sul FEPAGRO |
Busnello A.C.,Fundacao Estadual de Pesquisa Agropecuaria do Rio Grande do Sul FEPAGRO
Horticultura Brasileira | Year: 2015
A substrate is generally composed of different components such as peat, perlite, vermiculite, bark, as pine and eucalyptus, and various other wastes. The employment of waste as substrate to cultivate plants may provide alternative materials with stable structure, easy to obtain, constant availability and low cost. Therefore, we sought to describe two agro-industrial waste with potential use as a substrate for plants: crushed shells of pecan and tung decomposed aerobically and anaerobically. Materials were analyzed chemically and physical and mixed with brown peat in natura in six proportions of mixtures (100:0; 80:20; 60:40; 40:60; 20:80; 0:100). The pure material and the mixtures were analyzed for density, porosity, aeration and water availability, pH value and electrical conductivity. The waste, walnut pecan and tung husks, crushed, presented physical and chemical characteristics suitable for use as substrate, in mixtures with peat and in isolated form. © 2015, Sociedade de Olericultura do Brasil. All rights reserved.