![]() Nitrogen balance considers the nitrogen provided by fertilizers, atmospheric inputs, mineralization and crop residues and the nitrogen lost by the harvested biomass and leaching. In this context, nitrogen balance and nutrients use efficiency (NUE) can provide a first indication of nutrient dynamics in the system. However, the evaluation of these processes is not easy to carry out. Furthermore, the nutrient content in the soil can vary due to phenomena such as plant uptake and harvest, leaching, runoff, erosion and denitrification. Nutrients return to the soil could be through the mineralization of organic matter or through the use of external inputs, such as fertilizers, among others. To ensure soil conservation and minimize the loss of soil nutrients, it is important to evaluate whether nutrients return properly to the soil. What is clear is that nutrients are removed when the plant is harvested. Nevertheless, in some cases, crops with low nutrient-use efficiency are preferable if removal of excess nutrients is aimed at ( i.e. nitrogen oxides (NO x) (Smith and Slater 2021). Furthermore, a high nutrient content of energy crops is a negative quality parameter in combustion as it raises the amount of ash to be handled, reduces biomass energy content and can give rise to harmful emissions, e.g. The higher bark/wood ratio of younger stems in SRC systems and the higher nutrient concentration of the bark are important factors contributing to higher nutrient removal ( Adler et al 2005). Indeed, it has been observed that the short rotation coppice (SRC) of fast growing woody species has higher rates of nutrient removal by harvest than those presented by medium-rotation and mature forest ( Toillon et al. However, high biomass production always means that large quantities of nutrients from the soil are removed at harvest. Plants cultivated as short rotation coppices (SRCs) are characterized by high growth rate, adequate sprouting of the stool bed, and adaptation to sub-optimal environmental conditions ( Berbec and Matica 2020). Palabras clave: Cultivos de corta rotación biomasa NUEĮnergy crops have proved to be a viable alternative to fossil fuels. Si bien el cultivo del álamo tiene una eficiencia nutritiva positiva, en términos de nitrógeno, existe una pérdida significativa de este elemento en el ciclo de cultivo. Los resultados indican que la eficiencia en el uso de nutrientes para todos los elementos analizados presenta variaciones contenidas con valores ligeramente superiores en trienal para el nitrógeno y el fósforo. ![]() El objetivo de esta investigación fue estimar la eficiencia en el uso de nutrientes (nitrógeno, fósforo y potasio) y el balance de nitrógeno en cultivos energéticos de Populus deltoides clon Lux bajo dos ciclos de corta (bienal y trienal), realizados en condiciones de clima mediterráneo. Sin embargo, una alta producción de biomasa siempre significa que se eliminan grandes cantidades de nutrientes del suelo en la cosecha. Los cultivos energéticos han demostrado ser una alternativa viable para la producción de energía a partir de la biomasa producida. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |