Improving Onion Yield Through Transplanting

By TheHindu on 19 Jul 2016 | read

AGRI-FOUND ROSE or China Bellary is a small round pungent onion with a long shelf life.

It is cultivated in Cuddapah, Kurnool and Prakasam districts of Andhra Pradesh.

Farmers grow this onion by direct seeding of 6 kilograms per acre though research conclusively proved improved yields by transplanting seedlings raised from three kilograms of seed.

Scientists of the District Agricultural Advisory and Transfer of Technology Centre (DAATTC), Cuddapah have motivated farmers to try transplanting against the usual practice of direct sowing.

Three kilograms of the onion seed treated with captan at 3 g/kg was used for raising nursery to suffice for an acre. Raised nursery beds of 1 x 4 m size with 30 cm channel in between for wetting beds were formed.

The soil was treated with thirum at 3g/m{+2}. 100 kg of farmyard Manure (FYM) and 6 kg of single super phosphate (SSP) were applied and incorporated in 40 nursery beds.

The seeds were sown on the beds in rows 5 cm wide and 3 cm apart in a row at 1.5 cm depth. During the first week of July, 100 kg of finely powdered FYM was spread on beds uniformly.

The beds were wetted till germination and later by irrigation through channels afterwards. In this way water does not come in contact with seed or seedlings.

Drenching nursery beds with copper oxy chloride at 3 g/1 to cover one square metre was done on 15th and 30th day after sowing to prevent damping — a major problem in nurseries.

The 40 day old healthy seedlings were transplanted in main fields at 8 x 5 cm spacing during 3rd week of August. 10 tonnes of FYM, 150 kg of SSP, 40 kg of urea, 35 kg of muriate of potash (MOP) were applied as basal in addition to 20 kg zinc sulphate applied separately; subsequent top dressings were given on 20th day with 80 kg of calcium ammonium nitrate (CAN), on 40th day with 40 kg Urea, 60th day with 80 kg CAN + 35 kg MOP per acre.

For direct sown plots recommended basal dose before sowing and top dressing was given on 30th, 50th and 70th day after sowing.

One spraying each with dimethoate at 2 ml/1 against thrips and dithane M-45 at 2.5 g/1 against purple blotch were given. Regular culture operations like irrigation hoeing and weeding were done.

Harvesting was done during the 2nd week of December. Transplanted plots recorded a better yield.

M. Ramasubba Reddy,& B. Srinivasulu


Cuddapah-516001. A.P.