Cumulative effect of selected organic - biodynamic
manures on growth of Allium cepa Lin.
Perumal1*, K, V. Stalin1 & B. Janarthanam1
1Shri AMM Murugappa Chettiar Research
Centre, Tharamani, Chennai 600 113, India,
email: energy1@vsnl.com
Abstract
The present
study aimed to assess selected organic - biodynamic manures such as cow pat pit
(CPP), cow horn manure (BD 500), biodynamic herbal preparations such as (BD 502
- 507) were colleted from Shri AMM Murugappa Chettiar Research Centre, Tharamani and Kurinji
Organic foods Pvt Ltd., Genguvarpatti
Tamil nadu for their efficacy on the growth of Allium cepa
Lin. All the 4 combinations (CPP + BD
500, CPP + BD 502 - 507, BD 500 + BD 502 - 507 and BD 502 - 507) estimated for the
physicochemical properties such as pH, EC, humic
acid, organic carbon were recorded. BD (502 - 507) contained highest amount humic acid (40.02 mg/g of manure) and CPP + BD 500
contained highest amount of organic carbon (4.7 %) were recorded. The combined
selected organic - biodynamic manures were analysed
for presence of plant growth hormones, CPP + BD 500 combination had highest
amount indole acetic acid (50.2 mg/kg), gibberlic acid (23.6 mg/kg) and kinetin (10.5 mg/kg). Among
four combinations of organic and biodynamic manures, CPP + BD herbal
combination had remarkable influence on root and sheath of Allium
cepa grown in hydroponics growth conditions. The average onion roots (29 nos), rootlets (3.5 cm length), Sheath growth (32.4 cm),
cell size (42.16 m) and the metaxylem (2 nos) were recorded
maximum in CPP + BD 500 grown combination for 30 days. The anatomical structure
of onion root grown in CPP + BD 500 mixture had 2 metaxylem whereas the others had only one metaxylem. Positive relationships between production of
plant growth hormones and cytological effect in organic and biodynamic manures
have not only supplied the available nutrients but also significant effects on
crop growth and disease resistance.