Use of carnauba straw, incorporated at different times, for fertilization in carrot cultivation

Abstract

This experiment was set up with the objective of evaluate the effect of carnauba straw as an organic
fertilizer incorporated at different times in pre-planting in the carrot crop. The experiment
was conducted at the IFRN - Campus Ipanguaçu, located in the municipality of Ipanguaçu,
from July to September, 2015. The experimental design was a randomized complete block with
four replicates and five treatments, four of which refer to the time of 15; 30; 45 and 60 days of
incorporation before planting, using the dose of 14 Mg ha-1, and a control treatment without
addition of straw. It was observed a significant effect of treatments for root length and total dry
matter, and no effect was observed for root diameter and yield. It was observed a linear effect
of the time, being positive for total dry matter and negative for root length. The incorporation in
15 and 30 days before planting promoted the highest root lengths.