RESPONSE OF LITCHI (LITCHI CHINENSIS SONN.) TO N, P AND K FERTILIZATION IN THE NORTH OF OAXACA, MEXICO - A CASE STUDY
The response to NPK fertilization of six-year-old litchi trees, cultivar Brewster planted in northern Oaxaca was evaluated between 2009 and 2011. Six percentages (0, 25, 50, 75, 100, and 125%) of the concentration 50-130-50 kg ha-1 N, P2O5, K2O, 100% NPK with 3.6 t ha-1 compost, 100% NKP with 18 kg ha-1 with micronutrients, and 100% NPK with 18 kg ha-1 micronutrients and 720 kg calcium hydroxide (Ca(OH)2) were used as treatments. The first fertilization was applied in November 2009, however no response was found in 2010. In 2010-2011, the fertilization was divided into two. The first half was applied on August 30, 2010, and the second half on February 11, 2011. The results reported here correspond to the 2010-2011 period. The greatest foliar concentrations of N, P and K were obtained at the beginning of floral bud initiation stage with the highest fertilization concentrations. The highest flowering and fruit yield were obtained with the 100% concentration of NPK plus micronutrients, which were significantly greater than the control. The highest foliar chlorophyll content was obtained with the 125% treatment. The greatest values of dry matter weight of vegetative shoots and foliar area were obtained with the 100% NPK concentration plus compost treatment. The foliar N content was correlated with bud yield and foliar area (r=0.72 and r=0.65, respectively). It is concluded that litchi trees fertilized with NPK, compost, and micronutrients increased their N, P and K concentrations in the leaves, had more flowers, fruit yield, green colouring of the leaves, biomass of new shoots and foliar area. No response was seen due to application of calcium hydroxide.
Trinidad-Santos, A., Maldonado-Peralta , R. and Volke Haller , V.H. (2014). RESPONSE OF LITCHI (LITCHI CHINENSIS SONN.) TO N, P AND K FERTILIZATION IN THE NORTH OF OAXACA, MEXICO - A CASE STUDY. Acta Hortic. 1029, 191-198
foliar area, fertilization, flowering, yield, chlorophyll