Influence of edaphic and production conditions on yield components of linden (Justicia pectoralis J. var. pectoralis).
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Abstract
The objective of this research was to determine the influence of edaphic and production properties on the yield components of the tile. It was developing at Institute for Fundamental Research in Tropical Agriculture ''Alejandro de Humboldt'' (INIFAT). The planting of the crop was carried out on a substrate composed of earthworm humus and Red Ferralitic soil (proportion 1/1) and the latter as a control, under organoponic conditions. A randomized block design with three replications and two planting frames was used, under the effect of shade and sun. The physical properties were: apparent and real density, natural and hygroscopic moisture and total porosity and the biological ones: the abundance of the macrofaune and the ratio of detritivores/non-detritivores; physiological indicators of yield: length, number of branches and leaves, yield in kg.m-2. The real density showed values between 2.46-2.48 mg.m-3, which are considered adequate. The substrates reflected good natural moisture, characteristic of good contents of organic matter. The same thing happened with hygroscopic moisture. The porosity percentage indicated good aeration and drainage conditions (72.98 - 76.71%). The substrate complied with water and air supply, high water holding capacity, coupled with fast drainage and good aeration, which gave the substrate a better structure. A good abundance of macrofaune and fertility were observed according to the detritivore/non-detritivore ratio; which guaranteed the success of the system. The highest yields there obtained in the shade, at a distance of 10 x 30 cm, both on the ground and on the substrate, but in the last it was higher.
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