Application of lake sludge and natural phosphate on spinach plant cultivation (Amaranthus tricolor L.)

Abstract

Abstract Lake sludge and natural phosphate can be applied to the cultivation of various plants, but have not been applied to spinach cultivation. The aim of the study was to determine the effect of Lake Sludge dosage and Natural Phosphate dosage on growth and yield of unripe spinach. The experimental method with factorial RCBD used in this research. The results showed that the interaction between the treatment of lake sludge doses and natural phosphate doses did not significantly influence all observed variables. The highest yield for total dry weight per plant was obtained from the treatment of 150 g/polybag lake sludge which was 8.07g, and in the treatment of 40 g/polybag of natural phosphate dose which was 7.31 g. Both of the regression analysis between the dosages of Lake Sludge and Natural Phosphate with total oven dry weight per plant there is a linear relationship.