| dc.description.abstract | A study was conducted in Baratan village, district of Patrang, Jember, East Java, on the
effects of shoot pruning intervals and potassium fertilizer dosages on the growth and
yield of yam bean (Pachyrhizus erosus L.). Pruning of the plant shoot was done six weeks
after planting, 50 cm above the soil surface. Three levels of shoot pruning treatment were:
no pruning (control), shoot pruning every 7 days, and shoot pruning every 14 days. The
dosages of potassium fertilizer were: 0, 75, 150, 225, and 300 kg ha1 of K2O. The
experimental design adopted was the completely randomized block design (CRBD) with
three replications. The results showed that pruning of shoots every 7 days with
potassium fertilizer at 225 kg ha-1 gave the best effect on leaf area index, tuber diameter,
tuber fresh weight, tuber dry weight, and total plant fresh weight and dry weight,
respectively. Those values were 6.1; 18.88 cm; 468.56 g, 89.05 g, 710.32 g, and 143.54 g,
respectively. There was an increase of 289, 175, 392, 362, 247, and 223 percent again
without pruning and potassium fertilizer (control) treatments. Pruning shoots every 7
days with 300 kg ha-1 potassium fertilizer resulted in the highest tuber carbohydrate
content, which was 44.99 percent higher than the control treatment (no pruning and
potassium fertilizer application). | en_US |
