PENGARUH PEMUPUKAN TERHADAP PERTUMBUHAN DAN PRODUKSI JAMBU METE DI LOMBOK

USMAN DARAS, J. PITONO

Abstract


ABSTRAK
Penelitian dilakukan untuk mengetahui pengaruh dosis dan
komposisi pupuk NPK terhadap pertumbuhan dan produksi jambu mete
yang ditanam pada tanah regosol cokelat-kelabu di Desa Loloan,
Kecamatan Bayan, Lombok Barat, dari tahun 1997 sampai 2000. Faktor
yang diuji adalah: (1) komposisi NPK, 2 macam (1:1:1, dan 1:1:2); dan (2)
dosis pupuk, 4 taraf (500, 750, 1000 dan 1500 g/pohon/tahun). Perlakuan
disusun dalam rancangan acak kelompok dengan 4 ulangan dan ukuran
petak 4 pohon. Hasil penelitian menunjukkan bahwa tanaman jambu mete
cukup responsif terhadap pemupukan. Pemberian pupuk menaikkan
kandungan hara N, P dan K daun. Dosis pupuk yang cukup memadai untuk
menunjang pertumbuhan dan produksi jambu mete adalah 500, 750, dan
1000 g NPK/pohon/tahun dengan komposisi pupuk NPK 1:1:2, masing-
masing untuk umur tanaman 5, 6, dan 7 tahun. Pupuk tersebut diberikan
dalam 2 kali agihan, yaitu 50% pada awal musim hujan, dan 50% lagi
menjelang akhir musim hujan.
Kata kunci : Jambu  mete,  Anacardium  occidentale,  pemupukan,
pertumbuhan, produksi, Nusa Tenggara Barat
ABSTRACT
Effect of fertilizer application on the growth and yield of
cashew in Lombok
A field study was conducted on cashew trees grown at grayish-
brown regosol soil located at Loloan, Bayan, West Lombok, from 1997 to
2000. The objectives of the study were to examine the effect of NPK
fertilizer and its composition on growth and yield of cashew. Treatments
examined were: (1) composition of NPK (1:1:1, and 1:1:2); and (2)
fertilizer dosage (500, 750, 1000 and 1500 g NPK/tree/year). The
treatments were arranged in a randomized block design with 4 replications
and plot size of 4 plants. Research results showed that the application of
fertilizers significantly affected the growth and yield of cashew. The
content of N, P and K in cashew leaves improved as the fertilizer dosage
increased. Appropriate amounts of NPK were 500, 750 and 1000 g
NPK/tree/year with composition of 1:1:2 for cashew trees of 5, 6 and 7
years old, respectively. The fertilizers were applied twice a year (50% in
the beginning of rainy season, and 50% in the end of rainy season).
Key words : Cashew, Anacardium occidentale, fertilizer application,
growth, yield, West Nusa Tenggara

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DOI: http://dx.doi.org/10.21082/jlittri.v12n1.2006.20-26

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