Effects of Green Manure and Vermicompost on Soil Chemical Properties and Growth Parameters of Helianthus tuberosus L.

Abstract

The study was carried out in on-farm trial in Division of Plant Production Technology, Faculty of
Agro-Industrial Technology, Kalasin University, aiming at investigating the effects of green manure
and vermicompost on soil chemical properties and growth parameters of jerusalem artichoke (Helianthus
tuberosus L.).The experimental design was 2x4 split plot in RCBD with four replications. The green manure,
as a main plot consisting two levels i.e. control (M1
) and Crotalaria juncea L. 5 kg/rai of seed rate and
incorporated flowering stage (M2
), the sub plot consisting of no fertilizer (S1
), 25 kg/rai of chemical
fertilizer grade 12-24-12 (S2
), 500 (S3
) and 1,000 kg/rai (S4
) of vermicompost. Growth parameters of
jerusalem artichoke had data record, and chemical properties of soils analysis after jerusalem artichoke
harvesting. The results showed that effect of green manure showed significant increased plant height and
tuber fresh weight. Applications of 500 kg/rai of vermicompost gave stem diameters at above ground, plant
height and tuber fresh weight not difference with 1,000 kg/rai of vermicompost and 25 kg/rai of chemical
fertilizer grade 12-24-12. For chemical properties of soil, effect of green manure showed significant increased organic matter, and there was tendency that incorporated green manure has extractable
phosphorus and exchangeable potassium greater than control.The different fertilizers (sub plot) were not
significantly different effect on chemical properties of soils.