Title:
EFFECT OF BIOSTIMULANT BASED ON STRAW COMPOST AND N,P,K
FERTILIZER ON POPULATION OF AZOSPIRILLUM SP., N-TOTAL, AND RED
CHILI FRUITSET (Capsicum annum L.) IN SALINE SOIL |
Abstract:
Salinity due to abiotic stress can reduce yields and productivity of agricultural crops. The
purpose of this study was to determine the effect of biostimulant application based on straw
compost and N,P,K fertilizer in increasing saline soil fertility and yield of red chili (Capsicum
annum L.). This study used Randomized Block Design (RBD) with treatment a control, as well
as a combination of rice straw compost without and plus biostimulants with reduced doses of
N,P,K fertilizer on 0 dS/m and 4 dS/m soil. The results showed that the best population of
Azospirillum sp. in0 dS/m was found in the straw compost plus + fertilizer N, P, K
recommended dose with a population of (16.32 x 108 CFUg-1), and (4 dS/m) it was found in
thestraw compost + 1 dose of N,P,K fertilizer (13.91 x 108 CFUg-1). N-total soil gave no
significant effect on both of soils, however straw compost plus + 1 fertilizer N, P, K at the
recommended dose (4 dS/m) tends to increase compared to the initial soil analysis which
contains only (0.18%). Straw compost plus + 1 recommended dose of N,P,K fertilizer (0 dS/m)
can maintain flowers with the highest percentage of fruit set (90.86%). |
