Efficiency of fresh and dry onion mass with biochar and phytomass under water restricted conditions
Keywords:
Horticulture, Conservation management, Water stressAbstract
The objective of this work was to evaluate the efficiency of fresh and dry mass of onion in the use of biochar and phytomass under conditions of water restriction. The experiment was carried out in a greenhouse, with treatments in a 3 x 2 x 2 factorial, with three doses of biochar (0, 20 and 40 Mg ha-1 of thermoelectric ash, in similar properties to biochar); two doses of oat and ryegrass phytomass (0, 6 Mg ha-1 dry mass of straw); with and without water restriction (60 and 90% humidity in the pot capacity); in Nitossolo Bruno, with four replications, in a completely randomized design. The soil was collected in the layer from 0 to 20 cm in natural vegetation condition, sieved in a 5mm mesh. The vase with a capacity of 8 kg of dry soil, and soil moisture made with daily weighings. The plant was evaluated by fresh and dry mass of roots, leaves and bulbs. The results were made by comparing means of the tukey test. Leaf fresh mass had a significant effect on water restriction, biochar and straw. The root had significance in straw and biochar. In the bulbs there was a significant difference in the straw. In dry matter, leaf and root showed significant effects on straw and biochar. In the bulb there was a significant difference in biochar. In the averages test, fresh leaf mass had a significant effect on water restriction, biochar and straw. In the dry matter, the leaf and the root showed significance in the straw, and water restrictions.
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