PRODUKSI BUAH JERUK PADA BEBERAPA DOSIS PEMUPUKAN NPK DAN FREKUENSI PEMBERIAN PUPUK DAUN

Sakhidin Sakhidin, Anung Slamet Dwi Purwantono, Slamet Rohadi Suparto

Abstract


Penelitian dengan tujuan mengkaji pengaruh dosis pupuk NPK dan frekuensi pemupukan daun telah dilakukan di lahan percobaan (Ex Farm) Fakultas Pertanian Universitas Jenderal Soedirman. Penelitian merupakan percobaan faktorial dua faktor dengan menggunakan rancangan acak kelompok lengkap (RAKL). Faktor pertama yang diteliti adalah dosis pupuk NPK yaitu: 0 g/pohon, 25 g/pohon, 50 g/pohon, dan 75 g/pohon. Faktor kedua adalah frekuensi pemupukan daun yaitu 0 kali, 2 kali, 4 kali, dan 6 kali. Ada 16 bentuk perlakuan dengan 3 kali ulangan, sehingga dibutuhkan 48 tanaman jeruk yang ditanam di planterbag. Hasil penelitian menunjukkan bahwa selain fruitset, variabel yang diamati dipengaruhi oleh interaksi antara dosis pemupukan NPK dan frekuensi pemupukan daun. Jumlah bunga, jumlah buah, dan jumlah dompol buah tertinggi dicapai melalui pemupukan NPK 25 g/pohon dan pemupukan daun dua kali. Fruit set tertinggi dicapai melalui pemupukan NPK dengan dosis 25 g/ pohon.

Kata kunci: pupuk NPK, pupuk daun, jeruk, fruitset

 

The research aimed to study the effect of fertilizer dosages of NPK and frequency of foliar application was conducted at Ex Farm of Faculty of Agriculture, Jenderal Soedirman University. This factorial experiment of two factors used randomized completely block design (RCBD). First factor was NPK dosages namely 0 g/tree, 25 g/tree, 50 g/tree, and 75 g/tree. The second factor was frequency of foliar application : 0, 2, 4, and 6 times. There were 16 treatment combinations with 3 replication so there were 48 trees planted at planterbag. The result of research showed that except fruitset, all variables were influenced by interaction between NPK dosages and frequency of foliar application. The highest number of flower, fruits, and clusters were achieved by NPK dosage of 25 g/tree and two times of foliar application. Application of NPK by 25 g/tree gave the highest diameter of fruits.

Keywords: NPK fertilizer, foliar application, citrus, fruitset


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References


Alva, A.K., D.P.H. Tucker. 1999. Soil and citrus nutrition. In (Eds) L.W. Timmer and C.W. Duncan: Citrus Health Management. Gainsville University of Florida 6: 59 – 71

Alva, A.K., D. Mattos Jr., S. Paramasivam, B. Patil, H. Dou and K. Sajwan. 2006. Potassium management for optimizing citrus production and quality. Int. J. Fruit Sci. 6: 3 – 43

Ashari, S. 1995. Hortikultura, Aspek Budidaya. Penerbit Universitas Indonesia. 485 p.

Directorate of Fruit Crop. 2008. Indonesian Exotic Fruits. Directorate General of Horticulture, Ministry of Agriculture.

Dorji, K., L. Lakey, S. Chopel, S.D. Dorji, and B. Tamang. 2016. Adoption of improved citrus orchard management practices: a micro study from Drujegang growers, Dagana, Bhutan. Agric. & Food Secur. 5(3): 1 – 8

Hanif, Z. 2013. Mengapa Kita Masih Mengimpor Jeruk?. https://berandainovasi.com/mengapa-kita- masih-mengimpor-jeruk/.

Iglesias, D.J, M. Cercos, J.M. Colmenero-Flores, M.A. Naranjo, G. Rios, E. Carrera. et al. 2007. Physiology of citrus fruiting. Braz. J. Plant Physiol. 19(4): 333 – 362

Li, M., F. Jin, G. Zhou, M. Wan, L. Yang, C. Han, X. Ao. 2014. Study on the control technique of “on” and “off” years of early maturing Citrus unshiu. Agric. Scie. & Tech. 15(3): 381 – 385

Li. R., Y. Chang, T. Hu, X. Jiang, G. Liang, Z. Lu, Y. Yi and Q. Guo. 2017. Effect of different fertilization treatments on soil, leaf nutrient, and fruit quality of Citrus grandis var. Longanyou. World J. Eng. Technol. 5: 1 – 14

Liu, K., F. Huihua, B. Qixin, S. Luan. 2000. Inward potassium channel in guard cells as a target for polyamine regulation of stomatal movements. Plant Physiology 124: 1315 – 1326

Muhammad, H. 2007. Pengaruh pupuk fosfat dan kalium terhadap hasil dan karakteristik buah jeruk keprok selayar. J. Agrivigor 6(2): 122 – 132

Pracaya. 2009. Jeruk Manis, Varietas, Budidaya, dan Pascapanen. Penebar Swadaya.158 p.

Sakhidin, A.S.D. Purwantono, S.R. Suparto. 2017. Jumlah Trubus dan Bunga Jeruk pada Beberapa Tingkat Pemangkasan dan Dosis Pemupukan. Makalah Seminar Nasional “Pengembangan Sumber Daya Perdesaan dan Keraifan Lokal Berkelanjutan VII” tanggal 17-18 November 2017 di Java Heritage Hotel, Purwokerto.

Supriyanto, 2014. Teknologi Perbaikan Produktivitas dan Mutu Buah Jeruk untuk Menghadang Jeruk Impor. http://balitjestro.litbang.pertanian.go.id/teknologi-perbaikan-produktivitas-dan- mutu-buah-jeruk-untuk-menghadang-jeruk-impor/.

Sutopo. 2009. Rekomendasi Pemupukan untuk Tanaman Jeruk. Balai Penelitian Tanaman Jeruk dan Buah Subtropika.

Tiwari, K.N. 2005. Diagnosing potassium deficiency and maximizing fruit crop better production. Better Crop 89: 29 – 31

Wang, R., S. Xue-gen, W.Y. Zhang, Y. Xiao-e, U.Juhani. 2006. Yield and quality responses of citrus (Citrus reticulate) and tea (Podocarpus fleuryi Hickel) to compound fertilizers. Journal of Zhejiange Uni (China) 7: 696 – 701


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