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Muhammad Thamrin
BPTP Sulawesi Selatan
Agriculture, Biological Sciences & Forestry Engineering

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KAJIAN WAKTU STRANGULASI TERHADAP PEMBUNGAAN JERUK PAMELO ‘CIKONENG’ (Citrus grandis (L.) Osbeck) Muhammad Thamrin
Jurnal Pengkajian dan Pengembangan Teknologi Pertanian Vol 12, No 2 (2009): Juli 2009
Publisher : Balai Besar Pengkajian dan Pengembangan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jpptp.v12n2.2009.p%p

Abstract

An Assessment Time of Strangulation on Flowering Induction of Pummelo ‘Cikoneng’ (Citrus grandis (L.) Osbeck). Field assessment was conducted at Farmer’s Field Bantarmara Village, Cisarua, Sumedang region, West Java from August 2007 to May 2008, to determine the effect of different strangulation times on flowering induction of Pummelo during flowering-off season. Three strangulation times (1,2 and 3 months after harvest, MAH) were arranged in randomized complete block design with 6 (six) replications. An assessment results showed that strangulation at 3 MAH effectively induced flowering appearance (83%) and increased numbers of generative shoots, flowering cluster, bud, blooming, fruit formation and fruit setting. On the other hand, all treated plants had higher C/N ration than control. Kajian lapang dilaksanakan di Tanah Petani (TP) Bantarmara, kecamatan Cisarua, kabupaten Sumedang, Jawa Barat dari bulan Agustus 2007 sampai Mei 2008, untuk melihat waktu strangulasi yang tepat untuk menginduksi bunga diluar musim. Tiga waktu strangulasi (1, 2 dan 3 bulan setelah panen, BSP) disusun menurut rancangan acak kelompok dan 6 (enam) ulangan. Hasil kajian menunjukkan bahwa waktu strangulasi 3 BSP cukup efektif menginduksi jumlah muncul bunga (83%), tetapi mempengaruhi jumlah tunas generative, kluster bunga, kuncup bunga, bunga mekar, buah terbentuk dan fruit set masing-masing 32,67; 28,17; 220,00; 143.33; 61,17 dan 39,02%. Di samping itu, rasio C/N daun pada semua perlakuan lebih tinggi dari control.
KAJIAN PEMUPUKAN N, P, DAN K TERHADAP JAGUNG (Zea mays Linn) PADA LAHAN KERING TANAH TYPIC USTROPEPTS Peter Tandisau; Muhammad Thamrin
Jurnal Pengkajian dan Pengembangan Teknologi Pertanian Vol 12, No 2 (2009): Juli 2009
Publisher : Balai Besar Pengkajian dan Pengembangan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jpptp.v12n2.2009.p%p

Abstract

Kajian Pemupukan  N, P, Dan K  Terhadap Jagung (Zea mays Linn) Pada Lahan Kering Tanah Typic Ustropepts. Assessment of N, P, and K fertilizer to upland maize on Typic Ustropepts.   Assessment was conducted in Jeneponto South Sulawesi, started on October 2004 until March 2005. The objective was to know respon of maize (hybrid and non hybrid variety) to N, P, K fertilizer on upland and to compare farmer’s practice and complete NPK application. A split plot design with five replications was used. Maize variety was used as main plot, and omission plot (fertilizer application) as sub plot. Result showed as follows : 1) Maize respond to N, P, K fertilizer: 2) Un complete fertilizers application caused growth and field quality of maize become lower (10-30%). Complete fertilizers application (N,P,K:200:35:100) indicated much more higher yield (5,5 t/ha) than farmer’s practice (<150 N) with yield of 3,8 t/ha. Hybrid variety of BISI-2 give higher yield (5,67 t/ha) than non hybrid variety of Lamuru (3,3 t/ha). On dry land of typic Ustropepts, under dry climate, nutrient deficiency of N, P, K (low nutrient status), in Jeneponto, N, P, K fertilizer application suggested were 200:35:100 kg/ha or equally to 440 kg Urea, 223 kg SP-36, 191 kg KCl/ha, plus 500 kg organic metter/ha, with dibbling application, plant spacing of 75 x 20 cm2, one plant/hill.  Kajian dilaksanakan di Kabupaten Jeneponto Sulawesi Selatan pada bulan Oktober 2004 sampai Maret 2005. Tujuan kajian mengetahui tanggap tanaman jagung hibrida dan non hibrida terhadap pupuk N, P, dan K pada tanah Typic Ustropepts di lahan kering dan membandingkan aplikasi pemupukan cara petani dan lengkap NPK. Kajian dilakukan melalui pendekatan petak omisi dengan Rancangan Percobaan Petak Terpisah dengan lima ulangan, dimana varietas merupakan petak utama, sementara petak omisi (pemupukan) sebagai anak petak. Hasil kajian menunjukkan sebagai berikut: 1) Tanaman jagung tanggap terhadap pupuk N, P, dan K: 2) Pemberian pupuk yang tidak lengkap menyebabkan pertumbuhan dan hasil berkurang  (10-30%). Aplikasi pupuk lengkap N, P, dan K (200:35:100) menunjukkan hasil lebih tinggi (5,5 t/ha) dibanding cara petani (<150 N) yang hanya mencapai 3,8 t/ha. Jagung hibrida BISI-2 hasilnya lebih tinggi dari pada jagung non hibrida varietas Lamuru  (3,34 t/ha). Pada lahan kering Typic Ustropepts, iklim kering, kekurangan hara N, P, dan K (status hara rendah) di Jeneponto, anjuran aplikasi pupuk untuk jagung adalah 200:35:100 kg/ha atau setara dengan 440 kg Urea, 223 kg SP-36, 191 kg KCl/ha, disertai dengan 500 kg pupuk organik/ha. Aplikasi pupuk disarankan secara tugal, jarak tanam 75x20 cm2, satu tanaman/lubang.  
Co-Authors Peter Tandisau