The transformation and recycling of poultry litter through the pyrolysis process produces a co-product called biochar which, applied to the soil, improves the chemical characteristics of the soil and is used as a soil fertilizer due to its high content of nutrients to plants. The objective of this study was to assess the effect of biochar, produced from poultry litter wastes on soil chemical properties and the culture of the beak pepper (Capsicun chinense

Salinity in soil or water in arid and semi arid regions can severely limit crop production, since the high amount of NaCl contributes to specific ion effects of Cl − , Na + or both, and to antagonistic effects on nutrient elements. Affected by salt stress, most of the cultivated plants do not fully express their growth potential, which lowers their economic value. Crambe (Crambe abyssinica) is an oil plant of the cruciferous family and it is believed that crambe has great potential to figure as raw material for biofuel; however, literature is not abundant about the effects of salinity in crambe production. This work was carried out in order to evaluate the effects on the development and productivity of crambe irrigated with saline waters under greenhouse conditions. Treatments resulted from the combination of two factors: salinity of irrigation water (ECw) in five levels (1.03control, 2.5, 4.0, 5.5, and 7.0 dS•m −1) and two types of salts (NaCl and NaCl + CaCl 2) with three replications, totaling 30 experimental plots. At the end of the experimental period, soil samples from each plot were collected for chemical and salinity of soil saturation extract analyzes. Salt types did not affect plant parameters. However, the salinity levels presented significant effects on the all plant parameters, decreasing their values with the increase of the salt dose. Salinity levels of the solutions used for irrigation in this study affected the growth of plants and grain yield of crambe. Regarding the type of salts, a higher concentration of Na was observed for NaCl solutions at 2.5, 4.0 and 5.5 dS•m −1 salinity levels.

<p>O feijão-caupi tem grande importância socioeconômica, pois é um componente da dieta alimentar, especialmente pelo seu valor nutritivo e fonte de renda para agricultura familiar. Entretanto é uma cultura sensível a salinidade da água de irrigação e solo, o que impossibilita o cultivo em áreas afetadas por sais. Neste sentido, objetivou-se com o trabalho avaliar o crescimento de genótipos de feijão-caupi irrigados com água salina, a fim de fornecer subsídios ao cultivo em regiões afetadas por sais. A pesquisa foi desenvolvida em casa de vegetação da Universidade Federal de Campina Grande. Utilizou-se o delineamento experimental inteiramente casualizado, em esquema fatorial 2 x 5, sendo os tratamentos compostos de dois níveis de condutividade elétrica da água (A1 - água de abastecimento com 0,8dSm-1 e A2 - solução salina 4,8 dSm-1) e cinco genótipos de feijão-caupi (G1 - MNC04-762F-9, G2 - MNC04-762F-3, G3 - MNC04-762F-21, G4 - MNC04-769F-62 e G5 - MNC04-765F-153) com 4 repetições, resultante em 10 tratamentos. Aplicação dos tratamentos com água salina teve inicio aos 12 dias após o semeio (DAS). As variáveis analisadas foram, altura de plantas (ALT), número de folhas (NF), e diâmetro do caule (DC), nas épocas de avaliação correspondente aos 27, 42, 57 e 72 dias após a semeadura (DAS) e massa seca das folhas (MSF), massa seca do caule (MSC), massa seca da raiz (MSR) e massa seca da parte aérea (MSPA). A salinidade da água de irrigação reduziu todas as variáveis de crescimento e fitomassa avaliadas.</p><p> <em><strong>Growth bean-cowpea genotypes irrigated with saline water</strong></em></p><p>Abstract: The cowpea has great socio-economic importance, as it is a component of food people diet, especially in developing countries. Sensitive to salinity, which makes difficult to cultivate in areas affected by salt. The objective of the study was to evaluate the growth of cowpea genotypes irrigated with saline water in order to provide subsidies to farming in areas affected by salt. The treatments consisted of the combination of two factors: Irrigation Water Salinity (A1 - water supply with 0,8dSm-1 and A2 – saline solution 4.8 dSm-1) and cowpea genotypes (G1 - MNC04-762F -9, G2 - MNC04-762F-3 G3 - MNC04-762F-21 G4 - G5 and MNC04-769F-62 - MNC04-765F-153). Combined factors, a completely randomized design, resulted in 10 treatments, with four repetitions. The irrigation with saline water given to the 12 DAS. The variables analyzed were plant height (PH), leaves number (LN), and stem diameter (SD), the evaluation of times corresponding to 27, 42, 57 and 72 days after sowing (DAS) and dry matter leaves (DML), dry mass of the stem (DMS) and root dry mass (RDM). They salinity of irrigation water reduced all growth variables and evaluated biomass.</p>

<p>A mamoneira possui destacável importância no mundo, tem como principal produto derivado do seu óleo que pode ser utilizado como matéria prima para o biodiesel. Objetivou-se com este trabalho avaliar os níveis de tolerância das sementes de mamona ao estresse salino simulados por NaCl. A pesquisa foi desenvolvida no Laboratório de Irrigação e Salinidade na Universidade Federal de Campina Grande. Em cada tratamento foram utilizadas 100 sementes, dispostas em quatro repetições de 25 sementes. O delineamento experimental utilizado foi o inteiramente casualizado. Para a avaliação da germinação sob estresse salino utilizou-se soluções de NaCl com as seguintes condutividade elétrica: 0,4; 1,2; 2,2; 3,2 e 4,2dSm^-1. Realizou-se avaliações de porcentagem de germinação, tempo médio de germinação, velocidade média de germinação, índice de velocidade de germinação e aos 15 dias realizaram o comprimento da raiz primaria, da parte aérea, e pesou a massa seca e fresca das plântulas. As sementes de mamoneira BRS Energia apresentaram tolerância às águas com níveis de salinidade de até 4,2 dS m^-1 em relação ao índice de velocidade de germinação, tempo médio de germinação, velocidade média de germinação e porcentagem de germinação e o aumento da salinidade afetou o comprimento da parte aérea e da zona radicular.</p><p align="center"><strong><em>Effect of salinity on germination and initial development of castor bean ‘BRS energia’</em></strong></p><p><strong>Abrstact:</strong> The castor bean (<em>Ricinus communis L.)</em> is an oilseed that has detachable importance in Brazil and worldwide, its main product derived from its oil that can be used as raw material for biodiesel, therefore the aim of this study was to evaluate the tolerance levels of castor seeds to salt stress simulated by NaCl. In each treatment, 100 seeds, in four replicates of 25 seeds. For the evaluation of germination under salt stress was used NaCl solutions with the following electric conductivity: 0.4dSm-1 1.2dSm-1, 2.2dSm-1, 3.2dSm-1 and 4.2dSm-1. Was evaluated germination percentage, average time of germination, average speed of germination, GRI and 15 days held the length of the primary root, of shoots, and weighed dry and fresh weight of seedlings. The experimental design was completely randomized. The seeds of castor bean BRS Energia showed tolerance to water with salinity levels up to 4.2dSm-1 in relation to the germination speed index, average time of germination, average speed of germination and germination percentage and the high salinity affected the length of shoot and root zone.</p><p> </p>

Water availability is a fundamental condition for sustainable agriculture. However, a satisfactory water condition is not always possible in terms of quantity and quality in certain regions, such as the Brazilian semi-arid region. Thus, the purpose of this extremely important research was to evaluate the growth of cv. All Big with six combinations of wastewater plus saline (WW + SW) and two nutrient solution percentages, in a low-cost hydroponic system. The experiment was carried out in a greenhouse at the Department of Agricultural Engineering at Federal University of Campina Grande. A completely randomized experimental design was used, with treatments arranged in a factorial scheme (6 × 2), with 5 replications, being the treatments composed by the combination of six proportions of wastewater with saline water (50%/50%; 60%/40%; 70%/30%; 80%/20%; 90%/10%; 100% of wastewater) and two nutrient solution concentration (80% and 100%), totalizing 60 experimental units. The biometric variables were analyzed at 55 and 96 days after sowing, namely: plant height (PH), stem diameter (SD), leaf number (LN) and leaf area (LA). The interaction between the concentration of the nutrient solution and the ratio of the saline water with wastewater was influenced in the behavior of peppers (cv. All Big) biometric variables. The nutrient solution prepared at 80% of its normal concentration had better performance in the development of plants when mixed with the proportions of water containing more wastewater. The proportion 30% saline water and 70% wastewater (30/70) with concentration of 80% of the nutrient solution obtained better satisfactory results in the studied biometric variables.