Response of sweetpotato to the combined application of organic and inorganic fertilizers in marginal upland

Berta  C. Ratilla,; Jay-Ar  P. Bagarinao,; Othello  B. Capuno,

Response of sweetpotato to the combined application of organic and inorganic fertilizers in marginal upland

Berta C. Ratilla | Jay-Ar P. Bagarinao | Othello B. Capuno

Abstract:

Marginal uplands are characterized by low soil fertility and crop productivity. To alleviate the problem, organic amendments combined with inorganic fertilizer were tested to assess their effects on the growth and yield performance of sweetpotato; determine the option treatment combination; and assess the soil physicochemical properties. A Randomized Complete Block Design (RCBD) was used with 3 replications and 7 treatments namely: T = (0-0-0); T = 1 t ha Evans + 30-30-30 kg N, , 0 1 -1 P O K O ha ; T = 1 t ha Wellgrow + 30-30-30 kg N, P O K O ha ; T = 15 t ha chicken 2 5, 2 2 2 5, 2 3 -1 -1 -1 -1dung alone; T = 10 t ha chicken dung + 30-30-30 kg N, P O K O ha ; T = 15 t ha 4 2 5, 2 5-1 -1 -1Vermicast alone; and T = 10 t ha Vermicast + 30-30-30 kg N, P O K O ha . 6 2 5, 2-1 -1Application of 10 t ha of either chicken dung or vermicast plus 30-30-30 kg N, P O , -1 2 5K O ha in Inopacan, Leyte produced higher total root yield over the control. Root 2 -1 yield during the second cropping greatly increased to 16.19 t ha which is almost 3 -1 times higher than the first crop when 15 t ha chicken dung alone (T )was used. In -1 3 Sta. Rita, Samar, most of the growth, yield and yield parameters of sweetpotato , were not affected by the treatments. Moreover, only slight improvement in soil a properties was noted.

References:

Alcober EAL, Ratilla MD, Capuno OB & Valenzona JS. 2014. Evaluation of different cropping systems for marginal uplands in Inopacan, Leyte. Annals of Tropical Research. Vol. 36:124-138.
Ayoola OT and Makinde EM. 2007. Complementary organic and inorganic fertilizer application: influence on growth and yield of cassava/maize/melon intercropped with a relayed cowpea. Australian Journal of Basic and Applied Sciences, 1(3), 187-192.
Azeez JO and Averbeke W Van. 2010. Nitrogen mineralization potential of three animal manures applied on a sandy clay loam soil. Bioresource Technology, 101:5645-5651.
Branca G, Lipper L, McCarthy N & Jolejole Ma. C. 2013. Food security, climate change, and sustainable land management: A review. Agronomy for Sustainable Development, 33:635-650. doi 10.1007/s13593-013-0133-1
Gaurana ML. 2016. Field performance and sensory attributes of lowland rice (Oryza sativa L. var. PSB Rc18) under various organic production systems. Graduate Thesis. Visayas State University, Visca, Baybay City, Leyte. 144pp.
Hichman MV. 2002. Long term tillage and crop rotation effects on soil chemical and mineral properties. J Plant Nutrition. 25:1457-1470.
Johnston AE, Poulton PR & Coleman K. 2009. Soil organic matter: Its importance in sustainable agriculture and carbon dioxide fluxes. Advances in Agronomy, 101:1-57.
Landon JC. 1991. Brooker Tropical Soil Manual. Longman Scientific and Technical Essex, England. 474pp.
Lina SB, Maranguit DS, Asio VB, Sabijon JR, Demain KLB & Bolledo AB. 2014. Growth performance of corn as influenced by the combined application of organic and inorganic fertilizers in a marginal upland soil. Annals of Tropical Research, 36:16-29.
Mendoza T. 2002. "Impact of analysis of organic farming in rice agro-ecosystems in the Philippines". First RDA/ARNOA International Conference, RDA and Dankook, University of Korea, November 12-15, 2002.
Muller B, Pantin F, Génard M, Turc 0, Freixes S, Piques M & Gibon Y. 2011. Water deficits uncouple growth from photosynthesis, increase C content, and modify the relationships between C and growth in sink organs. J Experimental Botany. 62(6):1715-1729. doi: 10.1093/jxb/erq438. Epub 2011 Jan 14.
Ratilla BC, Toledo SP & Capuno OB. 2014. Evaluation of organic-based fertilizers for corn production in the marginal uplands of Inopacan, Leyte. Annals of Tropical Research, 36:107-123.
Schmitt MA, Schmidt JP, Randall GW, Lamb JA, Orf JH & Gollany HT. 2001. Effect of manure on accumulation of dry matter, nitrogen, and phosphorus by soybean. Communications in Soil Science & Plant Analysis, 32:1931-1941.
Scialabba NE and Hattam C. 2002. Organic agriculture, environment and food security. Environment and Natural Resources Series 4, Food and Agriculture Organisation of the United Nation, Rome.
Yang R, SU YZ, Wang T & Yang Q. 2016. Effect of chemical and organic fertilization on soil carbon and nitrogen accumulation in a newly cultivated farmland. Journal of Integrative Agriculture. 15(3):658-666.