Growth, yield and radiation energy conversion of sweet potato (Ipomoea batatas (L.) lam.) plant under different stake angles and various mulch type in the Papua highlands

A field experiment was conducted to study the effect of different levels of potassium and zinc on growth, yield and economics of sweet potato. The experiment was laid out on clay and loam soil by adopting randomized block design with factorial technique (FRBD). The sixteen treatments consisted of combination of four levels of po-tassium (0, 80, 100 and 120 kg/ha through muriate of potash and four levels of foliar zinc (control i.e. water spray, 10, 20 and 30ppm) through zinc sulphate. The individual application of potassium 120 kg K2O/ha significantly in-creased the number of tubers per plant (4.60), average weight of tuber (275.31 g), length of tuber (16.77 cm), diam-eter of tuber (5.69 cm), tuber yield per plot (9.71 kg), tuber yield per hectare (49.04 t) respectively as compared to control. With the foliar application of zinc (30 ppm) significant increase in number of tubers per plant (4.18), average weight of tuber (234.73 g), length of tuber (18.12 cm), diameter of tuber (5.16 cm), tuber yield per plot (8.33 kg) and tuber yield per hectare (42.05 t) was recordedas compared to control. The treatment combination (120 kg K2O+30ppm Zn) recorded the maximum yield parameters i.e. chlorophyll content (37.00 mg/100 g), average weight of tuber (302.17 g), length of tuber (19.82 cm), diameter of tuber (5.97 cm), maximum tuber yield per plot (11.02 kg), tuber yield per hectare (55.67 t) and benefit-cost ratio (B: C ratio) of 4.22:1.While, the treatment (120 kg K2O+30ppm Zn) had the maximum number of tuber (4.86), minimum number of tuber was recorded in control. From the experi-ment, it appeared that application of potassium and zinc can be used to improve yield and higher net monetary re-turns of sweet potato.

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The Effects of Temperature and Potassium Fertilizer on the Growth, Yield, and Biochemical Parameters of Ipomoea batatas var. Antin-1

Acta Agrobotanica ◽

10.5586/aa.7337 ◽

2020 ◽

Vol 73 (3) ◽

Author(s):

Rini Sulistiani ◽

Rosmayati ◽

Luthfi A. M. Siregar ◽

Fauziyah Harahap

Keyword(s):

Sweet Potato ◽

Ipomoea Batatas ◽

Growth Yield ◽

Glucose Production ◽

Morphological Properties ◽

Anthocyanin Content ◽

Potassium Fertilizer ◽

Glucose Content ◽

Four Levels ◽

The Impact

The impact of temperature and potassium fertilizers on the growth, yield, and basic biochemical characteristics of sweet potato, <em>Ipomoea batatas </em>var. Antin- 1, was investigated in lowland and highland terrains. In this study we aimed to determine the different traits of the sweet potato, based on its morphology, physiology, and biochemical composition, following treatments with a potassium fertilizer at different temperatures. The study was undertaken using a nested factorial design. The first factor was temperature at each of the two sites: T1 (lowland) and T2 (highland). The second factor was potassium fertilizer (K<sub>2</sub>O) nested within the temperature factor and consisting of four levels of K: K0 (0 kg/ha), K1 (50 kg/ha), K2 (100 kg/ha), and K3 (150 kg/ha). Each potassium treatment was replicated three times at each location. Plant vegetative growth in the lowland region, with a daily average temperature of 26.8 °C, tended to be more bushy, with several different morphological properties: The main stem was longer (160.7 cm) and spreading, the stem diameter was greater, and the petioles were significantly longer in the lowland plants compared with the highland plants; however, no differences were observed in the leaf characteristics. The differential temperature (depending on altitude) resulted in significant differences in relative growth rates (RGR) and net assimilation rates (NAR); the values for RGR-1 and NAR-1 in the lowlands were higher than those in the highlands. The tuber weight, yield index, anthocyanin accumulation, and glucose content were significantly higher in the highland crops than in the lowland plants, which grew under relatively higher temperatures. Potassium applications caused significant differences in the anthocyanin content (mg/100 g fresh weight), anthocyanin production (kg/ha), and glucose production (kg/ha) at different locations.

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EFFECT OF CHOPPED RICE STRAW AND FOLIAR APPLICATION OF POTASSIUM AND PHOSPHORUS ON GROWTH, YIELD AND TUBEROUS ROOT QUALITY OF SWEET POTATO (Ipomoea batatas L.) GROWING AT LATE SUMMER SEASONS UNDER CLAY SOIL CONDITIONS

Journal of Productivity and Development ◽

10.21608/jpd.2020.120749 ◽

2020 ◽

Vol 25 (2) ◽

pp. 213-229

Author(s):

Mohamed El Nagy ◽

Essam Abou El-Salehein ◽

Wafaa Fekry ◽

Helmy Wahdan

Keyword(s):

Sweet Potato ◽

Rice Straw ◽

Ipomoea Batatas ◽

Clay Soil ◽

Foliar Application ◽

Growth Yield ◽

Late Summer ◽

Soil Conditions ◽

Root Quality

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Teknik Penggunaan Ajir pada Beberapa Varietas Ubi Jalar (Ipomoea batatas L.) di Dataran Tinggi Papua

JURNAL BUDIDAYA PERTANIAN ◽

10.30598/jbdp.2020.16.1.77 ◽

2020 ◽

Vol 16 (1) ◽

pp. 77-87

Author(s):

Alberth Soplanit ◽

Merlin K Rumbarar ◽

Siska Tirajoh ◽

Nur E Suminarti

Keyword(s):

Solar Radiation ◽

Sweet Potato ◽

Potato Variety ◽

Ipomoea Batatas ◽

High Efficiency ◽

Block Design ◽

Dry Weight ◽

Radiation Energy ◽

Randomized Block Design ◽

Environment Experiment

This study aimed to obtain high efficiency in the use of solar radiation energy by combining varieties and stake angle (against horizontal) in sweet potato cultivation in the Papua highlands. The experiment was conducted on entisol soil type at 1560 m above sea level from April to September 2016. The environment experiment was arranged in a factorial Randomized Block Design with three replications. Factor A (variety) consisted of three varieties, i.e. Siate (local), Papua Sollosa, and Cangkuang; factor B (stake angle) consisted of four angles i.e. without stakes, 45°, 60°, and 90°. Specific Leaf Area decreased following an increase in stake angle levels for all varieties. The experiment reveals that Cangkuang with a 90° stake angle was higher on tuber dry weight (248.7 g per plant). The highest tuber yields were achieved by Cangkuang variety at 90° and 60° stakes angle with production 31.53 ton per ha and 28.86 ton per ha, respectively. Under conditions of abiotic stress due to the high level of cloud shade in the Papua highlands, it is recommended to use Cangkuang sweet potato variety or varieties with wide leaves, combined with the use of stakes at 90° and 60° angles. Keywords: Stake, solar radiation energy, sweet potato variety, Papua highland ABSTRAK Penelitian ini bertujuan untuk mendapatkan efisiensi penggunaan energi radiasi matahari yang tinggi dengan mengkombinasikan varietas dan kemiringan (sudut terhadap horizontal) ajir pada budidaya tanaman ubi jalar di dataran tinggi Papua. Penelitian berlangsung pada tanah entisol, ketinggian 1560 m di atas permukaan laut dari bulan April - September 2016. Rancangan lingkungan adalah faktorial yang disusun dalam Rancangan Acak Kelompok dengan tiga ulangan. Faktor A (varietas) terdiri dari tiga varietas, yakni Siate (lokal), Papua Sollosa dan Cangkuang; faktor B (sudut kemiringan ajir) terdiri dari empat sudut yakni tanpa ajir, kemiringan ajir 45°, 60° dan 90°. Hasil penelitian menunjukkan bahwa luas daun spesifik (LDS) menurun mengikuti peningkatan kemiringan ajir pada semua varietas, dengan bobot kering umbi tertinggi 248,7 g per tanaman dihasilkan oleh varietas Cangkuang pada kemiringan ajir 90°. Hasil umbi tertinggi secara berturut-turut diperoleh oleh varietas Cangkuang pada kemiringan ajir 90° dan 60° masing-masing 31,53 ton per ha dan 28,86 ton per ha. Pada kondisi cekaman abiotik akibat tingkat keawanan tinggi di dataran tinggi Papua, dianjurkan untuk menanam varietas ubi jalar Cangkuang atau varietas dengan karakter berdaun lebar dikombinasikan dengan penggunaan ajir dengan kemiringan 90° dan 60°. Kata kunci: Ajir, energi radiasi matahari, varietas ubi jalar, dataran tinggi Papua

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