Effects of Different Fertilizer Application Rates on Yield and Quality of Pineapple
The research was carried out to study the effects of different fertilizer application rates on the yield and quality of pineapple. Ananas comosusr cv. Yellow Mauritius was selected for the study with five treatments. The results showed that plant height, D-leaf length, D-leaf width, plant fresh weight, fruit length, fruit diameter, fruit eye number, fruit weight and yield increased with increasing fertilizer application rate. Vitamin C content had downward trends with increasing fertilizer application rate, the titratable acidity and total soluble solids content increased with increasing fertilizer application rate. However, total soluble sugar content had no an obvious changing rule. The order of fertilizer contribution rate(FCR) was in the order: FP 150%FP 120%FP 100%FP 80%. The highest FCR was only 48.57%, and the relationship of agronomic efficiency(AE) of them was FP 150% FP 120%FP 100%FP 80%. Under the precondition of not significantly reducing pineapple yield and affecting pineapple quality, the fertilizer application rate of farmer should decrease 20% to improve the agronomic efficiency.