Pengaruh Intensitas dan Saat Pemberian Naungan Terhadap Hasil Ubi Jalar (Ipomea batatas (L.) Lam)

Abstract

This experiment was carried out at Darmaga Mperiment- 61 Station IPB, Bogor from October 1983 t o March 1984. Factorial with randomized block design in three replicates was used en sweet potato of Daya variety. Shading intensity of 0, 25 and 50 percent were given at 7, 11, 15 weeks a f t e r planting, Shading intensity of 25 percent decreased marketable tuber yield 42 percent, and t o t a l tuber yield 24 percent while. Shading intensity of 50 percent decreased marketable tuber yield 63 percent and t o t a l tuber yield 50 percent. Time of shading indicated the trend that the e a r l i e r the crop was shaded and the higher the shading intensity, the lower the tuber yield.