THE EFFECT OF HARVESTING TIME AND INOCULANT ADDITION ON PEANUT (Arachis hypogaea L.) PRODUCTIVITY

THE EFFECT OF HARVESTING TIME AND INOCULANT ADDITION ON PEANUT (Arachis hypogaea L.) PRODUCTIVITY

Brígida Antónia Correia

ABSTRACT
The study was carried out on plastic house in Farm belong to the Laboratory of Forage and Pasture of the Animal Sciences Faculty, University Gadjah Mada, Yogyakarta. This research was intended to get the data about the effects of harvesting time and inoculant addition on peanut productivity. Twenty four polybags (plastic bags) were used and each containing 15 kg of soil. The soiltype was of kind of Alfisol (Mediteran) from Gunung Kidul district. Experimental design was factorial, namely 2 x 2 x 2 treatment factors with 3 replication arranged in a complelety randomized design (CRD). The three treatment factors were: Harvesting time factor (UP) consisted of UP1=harvested at 80 days and UP2=harvested at 90 days of age; Soil factor (T) consisted of To=not sterilizated and Ts=sterilized, and Legin factor (L) consisted of Lo=not inoculated and L1= inoculated. The results of the study showed that there were highly significant (P < 0.01) effect of all the treatment factors on dry matter (DM) production (0.59 ton vs 0.69 ton/ha), CF (28.25% vs 24.59%), ash (10.11% vs 9.48%) and NFE (41.21% vs 46.05%). Soil factor (T) was effected highly significant (P < 0.01) on dry matter (DM) production (0.72 ton vs 0.56 ton/ha),CP (16.01% vs 18.07%) and ash (9.44% vs 10.15%). Legin factor (L) was also effected highly significant (P < 0.01) on IVDMD (59.90% vs 62.77%) and IVOMD (58.86% vs 62.65%) but effected to ash only (P < 0.05) (9.55% vs 10.03%). It also formal that interaction between three factors (UPxTxL) affected DM production (0.47 ton/ha on UP1TsL1 to 0.79 ton/ha on UP2ToLo), and CP (14.81% on UP1ToLo to 18.58% on UP1TsL1). EE, ash, NFE, IVDMD and IVOMD were also depended on interaction between two factors (UP x T), (UP x L) and (T x L). It can be concluded that nutritive value of peanut forage decreased, while forage DM production of biomassa above the ground increased as the harvesting age increases from 80 to 90 days. The highest peanut productivity was obtained when planting was carried out with inoculation on unsterilized soil.

Key words : Peanut, Harvesting Time, Legume Inoculant, In vitro digestibility, Forage productivity .