THE INFLUENCE OF STEAM ON SOME CHEMICAL SOIL PROPERTIES - REVIEW

Soil forms a thing mantle over the Eart¢s surface and acts as the interface between the atmosphere and lithosphere, the outermost shell of the Earth. It is a multiphase system, consisting of mineral material, plant roots, water and gases, and organic matter at various stages of decay (Bardgett R., 2005,). Soil temperature influence plant nutrients uptake through a multitude of chemical, physical and biological processes that intercat over wide range of spatial and temporal scales (BassiriRad H, 2005) Steaming is traditionally used in glasshouses to sterilise the soil and control both weeds and diseases prior to crop establishment. Steam is applied under pressure beneath metal pans forced down onto freshly formed beds for periods of 3-8 minutes. The steam raises the soil temperature to 70-100 °C killing most weed seeds to a depth of at least 10 cm. The increase in inorganic substances in soil due to steaming means an increased fertility as more nutrients become available for the plant (Bond et al., 2003

ROOTING EFFICIENCY RESEARCHES FOR THE CAMPSIS RADICANS SPECIES USED FOR IMPROVING SLOPES

Campsis radicans (trumpet creeper) is native to the southeastern part of the United State, being a perennial woody vine with showy red-orange flowers that are attractive to hummingbirds (Streiner, 2006). The main objective of the study is determination the Campsis radicans growing, the species being used for the eroded slopes. For this study were collected 80 cuttings by Campsis radicans and there were put in a peat and perlite substrate. The plants were placed in the greenhouse. The experiments were performed during three years (2016-2018). The determination about cutting height and annual growing was made. In 2018 it was used a treatment with a rooting hormone named RADI-STIM. In 2016 an average growth of 2.7 cm was recorded and the percentage of rooting was 23.75%. In 2017 an average growth of 6.8 cm was recorded and the percentage of the rooting is 28.75%.  In 2018 the recorded average growth was 11cm, with a percentage of rooting of 60%.  The highest number of the cutting rooted was done at cutting introduced in RADI-STIM with a percentage of 60%