tailieunhanh - Liming and application of nitrogen, phosphorus, potassium, and boron on a young plantation of chestnut
European chestnut is the most important cash crop in the highlands of NE Portugal. However, limited data on cropping technique are available to help farmers make decisions. This work is motivated by the lack of data related to chestnut response to fertilizer application. | Turkish Journal of Agriculture and Forestry Turk J Agric For (2017) 41: 441-451 © TÜBİTAK doi: Research Article Liming and application of nitrogen, phosphorus, potassium, and boron on a young plantation of chestnut 1, 1 1 Margarida ARROBAS *, Sandra AFONSO , Isabel Q. FERREIRA , 2 2 1 José MOUTINHO-PEREIRA , Carlos M. CORREIA , M. Ângelo RODRIGUES 1 Mountain Research Centre, Polytechnic Institute of Bragança, Bragança, Portugal 2 Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal Received: Accepted/Published Online: Final Version: Abstract: European chestnut is the most important cash crop in the highlands of NE Portugal. However, limited data on cropping technique are available to help farmers make decisions. This work is motivated by the lack of data related to chestnut response to fertilizer application. It reports results from a field fertilization trial consisting of the application of a combination of lime (L), nitrogen (N), phosphorus (P), potassium (K), and boron (B), namely LNPKB, NPKB, –NPKB, N–PKB, NP–KB, and NPK–B. Seedlings of chestnut were planted in June 2013 and grown for four growing seasons. Plant height, trunk diameter, and pruning wood were assessed every year and used as indicators of tree crop growth. Elemental leaf analysis and other tools [SPAD-502 chlorophyll meter; Field Scout CM 1000 NDVI (normalized difference vegetation index) meter, and the OS-30p+ fluorometer] were used to assess plant nutritional stresses. In January 2017 soil samples were collected at three depths (0–5, 5–10, and 10–20 cm) to determine several soil fertility parameters. The nonapplication of K and B reduced the tree crop growth and pruning residues. Leaf analysis revealed leaf K and B concentrations respectively in the NP–KB and NPK–B treatments to be in the .
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