Study on forage Arachis spp. (8) Seed yield and quality of Arachis pintoi cv. amarillo as affect by soil amendment material in Pakchong soil series

Study was conducted to investigate the effect of soil amendments on seed yield and seed quality of Arachis pintoi cv. Amarillo at Pakchong Animal nutrition Research Center during April 1999-May 2000. The soil is Pakchong soil series. Treatments consisting of 7 soil amendment material : (1) nil (control) (2) rice husk burned at 3 tonnes per rai (3) rice husk burned at 6 tonnes per rai (4) pig manure at 3 tonnes per rai (5) pig manure at 6 tonnes per rai (6) cattle manure at 3 tonnes per rai (7) cattle manure at 6 tonnes per rai. Treatment were arrange in randomized complete block design with 4 replications. Seed were harvested at 8 months after planting. The resulted showed that no response of increased seed production (P GT 0.05) in A. pintoi cv Amarillo to soil amendments application (average pure seed yield 609 kg per rai). Seed quality was not significant difference (P GT 0.05). Average purity was 95.56 percent and 1000 seed weight was 188.6300 gm. The highest (P LT 0.05) seed germination were obtained from plants grown with cattle manure at 6 tonnes per rai, pig manure at 6 tonnes per rai and rice husk burned at 3 tonnes per rai (92.75, 91.20 and 90.50 percent, respectively). The highest germination percentage of seed in pod was obtained from application of pig manure at 6 tonnes per rai (89.28 percent). Dry matter yield of leaves and stems before seed harvesting was not significant different (P GT 0.05) (average 740 kg DM per rai). The highest CP content (p LT 0.05) was obtained from applied pig manure at 6 tonnes per rai (8.12 percent). The plant had 100 percent soil cover 3-4 months after planting. The highest flower number occurred in September while there was the high rainfall. The highest increasing of soil pH and CEC (p LT 0.05) at the end of the study were obtained from applied cattle manure at 3 tonnes per rai (6.76 and 21.29 meq/100 g soil, respectively).