Dual-Purpose Assessment for Sweetpotato

Abstract

This study aimed to classify the types of sweet potato based on the ratio of total dry matter of roots to vine (R/V) in order to make the option available in integrating the crop-livestock systems. Seventeen sweet potato cultivars were planted in Randomized Complete Block Design with three replications applied at two locations, Malang and Blitar. Each cultivar planted in plot measures 2.5 m x 5 m in Malang and 3.0 m x 5 m in Blitar, and each consists of four rows with a spacing of 25 cm in rows. All cultivars gave a dose of 250 kg NPK fertilizer (15-15-15)/ha twice, one-third of dose given at planting and the remainder in a month after planting. Plants were harvested at four months after planting. Fresh weight and dry weight of storage root, fresh weight and dry weight of vines, harvest index, and the ratio R/V are determined. There was different performance of 17 cultivars planted at two locations. Cultivars planted in Malang were classified into four types, namely forage, which consists of three cultivars among 17 cultivars, low dual-purpose (3 cultivars), high dual-purpose (7 cultivars), and low root production (4 cultivars); while cultivars planted in Blitar turned into the forage type.

Identifikasi Stabilitas Hasil Genotipe Ubi Jalar (Ipomoea batatas L. (Lam)) Harapan Baru di Tiga Lingkungan

“…Perbedaan performa hasil setiap genotipe yang diuji pada setiap lokasi pengujian, dikarenakan kondisi lingkungan yang berbeda terutama pada lokasi kabupaten Bandung dan Karawang dengan kondisi yang cukup ektrim, sehingga tanaman yang diuji tercekam oleh kekeringan. Hal ini juga dilaporkan oleh beberapa penelitian sebelumnya yang menyebutkan bahwa cekaman kekeringan sangat mempengaruhi performa hasil tanaman (Lestari and Ricky, 2015;Opafola et al, 2018). Selain itu, latar belakang genetik dan tetua persilangan yang berbeda juga menyebabkan potensi setiap genotipe yang diuji berbeda.…”

ANALISIS KORELASI DAN JALUR DALAM PENENTUAN KRITERIA SELEKSI UBI JALAR (Ipomoea batatas (L.) Lam.) BERDAYA HASIL TINGGI

“…Menurut Sitorus et al (2011) dan Motsa et al (2015) bahwa faktor pembatas utama tercapainya potensi hasil tanaman diakibatkan oleh kondisi kimia tanah, fisik lahan, dan lahan terdegrasi. Pertumbuhan dan komponen hasil ubi jalar sangat dipengaruhi oleh kelebihan dan keterbatasan volume curah hujan (Lestari & Hapsari, 2015 ;Saitama et al, 2017). Tipe pertumbuhan ubi jalar di lahan kering dapat berubah dari ubi jalar tipe forage ke tipe dual-purpose dan sebaliknya dari tipe dual-purpose dapat berubah menjadi tipe forage ketika besarnya curah hujan berubah (Lestari & Hapsari 2015).…”

The Pruning Effect on the Storage Root Yield and Starch Content of Sweet Potato Clones Planted at Dry Land

“…Besides the dualpurpose cultivars, two other cultivars were also planted as controls. The cultivars chosen as the control varieties were based on the types of storage root production, namely BIS OP-61-OP-22 and Sari (Lestari and Hapsari, 2015). All plants were given the fertilizer of 300 kg NPK ha -1 and 100 kg KCl ha -1 and 5 ton ha -1 of the biochar.…”

“…However, information on agronomic practices to produce storage roots and vines optimally is still limited. The vines of sweet potato are quite abundant at harvest, Lestari and Hapsari (2015) showed that sweet potato plantation was able to produce vine yields ranging from 5-56 ton ha -1 on fresh weight or 2-7 ton ha -1 on dry weight. Similarly, another study on three cultivars, found that the plantation was able to provide its fresh vines ranging from 14.9-53.5 ton ha -1 and dry vines of 2.3-7.9 ton ha -1 (Mussoline and Wilkie, 2017).…”