This study aimed at estimating the wood ash as a corrective and fertilizer in the safflower crop. This study was done with respect to the development, growth, and production of safflower in response to the wood ash doses applied to Oxisol of the Brazilian Cerrado biome. Adopting the completely randomized design and using five wood ash doses (0, 8, 16, 24, 32 g dm -3 ) and six replicates, the experiments were performed under greenhouse conditions. Each experimental unit included a 2 dm 3 pot, filled with soil that had been incubated earlier for 30 days. The variables studied included soil pH, plant height (cm), stem diameter (mm), number of leaves (plant ) and root dry mass (g pot -1 ) Analysis of variance and subsequent regression test were performed for all the data using SISVAR software, at 5% probability for both. The variables internal and external diameter of the chapters and root volume showed no significant differences. The soil pH revealed a significant effect of the wood ash application tending towards linearity, as did the other vegetative variables of plant height, stem diameter, number of leaves and SPAD index. The productive constituents exhibited improved development when the wood ash was applied to the soil in doses of around 24 g dm -3 or more.

Growth and development of cowpea under wood ash doses and liming Crescimento e desenvolvimento do feijão caupi sob doses de cinza de madeira e calagem

Quinoa (Chenopodium quinoa Willd.) quickly adapts to different climatic conditions; however, low soil fertility conditions and inadequate soil water levels may reduce yield. The objective of this study was to evaluate the effect of irrigation levels and potassium fertilization for quinoa production in the Cerrado Oxisol. The experiment was performed in a greenhouse, located at the Federal University of Mato Grosso (UFMT), Campus of Rondonópolis -Brazil, using soil collected from a Cerrado Oxisol. The experimental design was a randomized complete block design in a 5x5 factorial scheme with four replicates, corresponding to five potassium doses (0, 100, 200, 400 and 600 mg dm -3 ) and five irrigation levels (50, 75, 100, 125 and 150% of field capacity). The variables of dry mass of shoot, dry mass of roots, water use efficiency, mass of 100 grains, production and number of grains were analyzed. The dry mass of the aerial part and the roots are influenced by the potassium fertilization in the doses between 530 and 600 mg dm -3 . All the vegetative and productive characteristics were affected by the treatments. The highest water use efficiency was observed at the potassium (K 2 O) dose of 375 mg dm -3 and a 50% irrigation level.

No abstract

O Cerrado brasileiro apresenta uma certa previsibilidade em relação a pluviosidade, caracterizando-se em dois períodos: um chuvoso e outro seco. A oferta de água e seu consumo se tornam relevantes, para os diversos cultivos, isso porque a água é o principal preditor do desenvolvimento vegetal. A cultura do trigo surge como alternativa para produção no Brasil central, sendo importante sua adaptabilidade e eficiência nas condições do ambiente. O objetivo do trabalho foi submeter três cultivares de trigo, BRS264, BRS394, BRS404, indicadas para região central do Brasil, submetidas à cinco tensões hídricas: 12; 24; 36; 48 e 60kPa; em casa de vegetação, dispostos em vasos sob o delineamento em blocos ao acaso, esquema fatorial (5X3), com cinco repetições. O Monitoramento das irrigações foi a partir da leitura do sensor de capacitância (modelo- ML3, Delta T). As características avaliadas foram altura de plantas, número de espiguetas por espiga, número de grãos por espiga e índice de colheita. As cultivares BRS394 e BRS264 possuem as melhores respostas para as variáveis: altura de plantas, número de espiguetas por espiga e índice de colheita, em relação a cultivar BRS404 que demonstra menor adaptabilidade sob deficiência hídrica, A tensão hídrica do solo de 12KPa obteve os melhores resultados em relação as outras tensões.