The objective of this paper relies on the establishment of the sampling moment and the nutritional state of the species Conilon coffee （Coffea canephora） cultivated in Cambisoils. The effect of different rates of ni...The objective of this paper relies on the establishment of the sampling moment and the nutritional state of the species Conilon coffee （Coffea canephora） cultivated in Cambisoils. The effect of different rates of nitrogen fertilization was also studied in the leaves concentrations of N, at randomized complete block designs （N0= 0; N1 = 50; N2 = 100; N3 = 150 and N4 = 200 kg.ha^-1 of N） in presence of P （40 kg.ha^-1 of P2O5） and K （160 kg.ha^-1 of K2O）, with four replicates. The samples were carried out in the months of March （flower blossoming stage）, June （fruits growing stage）, September （grain development） and December （maturation） in all treatments. Foliar analysis carried out in the month of June （fruits growing stage） for the purpose of establishing critical nutrient range values for N, settling down approaches of interpretation of the same one for the Conilon coffee plantations on Cambisoils. The biggest percentages in the yields are obtained with leaves containing N between 2.80% and 3.10%, a value below 2.80% N which they associated with indicative percentages of stable maximum yield that did not surpass the limits of the adequate nutrients supply.展开更多
The research was carried out to study the effect of varying certain ecological conditions in the coffee through the implementation of different agronomic practices such as regulation of the shade, ground cover and reh...The research was carried out to study the effect of varying certain ecological conditions in the coffee through the implementation of different agronomic practices such as regulation of the shade, ground cover and rehabilitation of plantations on the populations of the coffee berry borer Hypothenemus hampei Ferrari （Coleoptera： Curculionidae）, it was also evaluated the influence of these conditions in the introduction and transfer of new variants of application of the fungus Beauveria bassiana （Balsamo） Vuillemin. The results showed that the pest damage was lower under a system of sustainable coffee, designed after the restoration of the population density of coffee, conducting systematic pruning and plant health, sanitation of the forest, shade management to double stratum with scattered light intensity of 60-70% and a combination of systems of denominated handling of weeds （Strip weeding - Ring weeding）, it was found that under these conditions the technical effectiveness of the fungus B. bassiana was higher compared with applications made in the trees less enlightened, being more advantageous to spray the foliage four times with a frequency of 40 days from 60 days to peak flowering with positive economic indicators even when used as single biological control strategy against the coffee berry borer.展开更多
文摘The objective of this paper relies on the establishment of the sampling moment and the nutritional state of the species Conilon coffee （Coffea canephora） cultivated in Cambisoils. The effect of different rates of nitrogen fertilization was also studied in the leaves concentrations of N, at randomized complete block designs （N0= 0; N1 = 50; N2 = 100; N3 = 150 and N4 = 200 kg.ha^-1 of N） in presence of P （40 kg.ha^-1 of P2O5） and K （160 kg.ha^-1 of K2O）, with four replicates. The samples were carried out in the months of March （flower blossoming stage）, June （fruits growing stage）, September （grain development） and December （maturation） in all treatments. Foliar analysis carried out in the month of June （fruits growing stage） for the purpose of establishing critical nutrient range values for N, settling down approaches of interpretation of the same one for the Conilon coffee plantations on Cambisoils. The biggest percentages in the yields are obtained with leaves containing N between 2.80% and 3.10%, a value below 2.80% N which they associated with indicative percentages of stable maximum yield that did not surpass the limits of the adequate nutrients supply.
文摘The research was carried out to study the effect of varying certain ecological conditions in the coffee through the implementation of different agronomic practices such as regulation of the shade, ground cover and rehabilitation of plantations on the populations of the coffee berry borer Hypothenemus hampei Ferrari （Coleoptera： Curculionidae）, it was also evaluated the influence of these conditions in the introduction and transfer of new variants of application of the fungus Beauveria bassiana （Balsamo） Vuillemin. The results showed that the pest damage was lower under a system of sustainable coffee, designed after the restoration of the population density of coffee, conducting systematic pruning and plant health, sanitation of the forest, shade management to double stratum with scattered light intensity of 60-70% and a combination of systems of denominated handling of weeds （Strip weeding - Ring weeding）, it was found that under these conditions the technical effectiveness of the fungus B. bassiana was higher compared with applications made in the trees less enlightened, being more advantageous to spray the foliage four times with a frequency of 40 days from 60 days to peak flowering with positive economic indicators even when used as single biological control strategy against the coffee berry borer.
