Effect of nonwoven jute agrotextile mulch on soil health and productivity of broccoli (Brassica oleracea L.) in lateritic soil.

Abstract

A field experiment was conducted in winter season of 2015-2016 in the dry lateritic soil of Eastern India to study the effect of different thicknesses of nonwoven jute agrotextile mulches (NJATM) along with other mulches on soil health, growth and productivity of broccoli (Brassica oleracea L.). The experiment was conducted in randomized block design with six treatments viz., T1 (control, i.e. no mulching), T2 (300gsm NJATM), T3 (350gsm NJATM), T4 (400gsm NJATM), T5 (rice straw) and T6 (black polythene mulch), each of which was replicated four times. The highest average curd weight (355.25g) and yield (8.53tha-1) of broccoli were recorded in T3 treatment. The lowest density of broad leaved weed, sedges and grasses were recorded in T6 treatment which was statistically at par with T4. All the treatments composing of NJATM increased the population of all the soil microbes except bacteria in the root rhizosphere of broccoli from their initial population. On average, the highest population of fungi (54.0 × 103cfu per g) and actinomycetes (134.75 × 103cfu per g) was recorded with T3 and T4 treatments respectively in the post-harvest soil. The soil moisture was conserved in all treatments compared to control showing highest moisture content in T4 treatment. Organic carbon and available N, P and K contents of soil were increased in all mulch treated plots compared to control, and their initial value and their highest value were recorded in T3. The NJATM of 350gsm thickness was very effective compared to other mulches in increasing the growth and productivity of broccoli by suppressing weeds, increasing moisture, microbial population and nutrient content of the lateritic soil.