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All Journal Journal of Degraded and Mining Lands Management Jurnal Penelitian Pertanian Terapan Jurnal Agrotropika Jurnal Pengabdian Nasional Agritrop : Jurnal Ilmu-Ilmu Pertanian (Journal of Agricultural Science)
Denny Sudrajat
Jurusan Tanaman pangan Politeknik Negeri lampung Jln. Soekarno Hatta No. 10 Rajabasa Bandar Lampung
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Economics, Econometrics & Finance Environmental Science Industrial & Manufacturing Engineering Social Sciences

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Identifikasi Karakter Morfofisiologi Kedelai Adaptif Lahan Masam Sudrajat, Denny
Jurnal Penelitian Pertanian Terapan Vol 10, No 2 (2010)
Publisher : Politeknik Negeri Lampung.

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (489.849 KB) | DOI: 10.25181/jppt.v10i2.252

Abstract

Efforts to increase soybean production in acid soil can be done in two ways, were: (1) Calcification to improve the physical and chemical properties of land that is suitable for planting soybeans, or (2) through use of genotypes that have a high tolerance for stress Al (Muhidin,2002). Therefore, adaptive soybean varieties with the sour land 30-35% aluminum saturation and pH 4.5-5.0, and supported by soybean cooking genjah age (75 days) prospectively for soybean development outside Java. Varieties that have been known to land a sour adaptiv like Ratai, Sibayak, Nanti, Tanggamus and Seulawah consistent power adaptations to soil acidity, this is indicated by both agronomic traits and physiology. Anatomical characters show the most stress in response to Al is the root, the varieties sour adaftiv land rooting organ hampered not at all, the roots can develop well. The study concluded that the varieties that have been known to land a sour adaftiv like Ratai, Sibayak, Nanti, Tanggamus and Seulawah have a high consistency of the soil acidity, with roots showing growth and the number of normal pods. Root dry weight parameters can be used to assess the toxicity consideration Aluminum plant, which can be used as character selection in plant breeding process. Keywords: Morfofisiologi, Aluminium
Enhancing composting efficiency: Impact of microbial consortia on cow manure decomposition Priyadi, Priyadi; Rahmadi, Rizky; Rochman, Fajar; Dulbari, Dulbari; Sari, Evi Yunita; Buana, Arum Sekar; Sudrajat, Denny; Surahman, Suryansyah
Journal of Degraded and Mining Lands Management Vol. 12 No. 3 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2025.123.7659

Abstract

Composting organic waste is significantly gaining attention as a sustainable and environmentally friendly material. This is because the use of microorganisms or microbial consortia in the composting process can enhance the quality of compost. Therefore, this study aimed to examine the impact of microbial consortia on cow manure composting efficiency and nutrient content. The experiment was conducted at the Polinela Organic Farm, Department of Food Crop Cultivation. A randomized block design was used with multiple treatments combining fresh cow manure and microbial inoculants, including catalyst, Bacillus, and Trichoderma. The parameters evaluated were the effects of water content, pH, temperature fluctuations, and macronutrient levels on composting, including nitrogen, phosphorus, and potassium. The results showed that microbial consortia significantly improved composting parameters such as moisture retention and temperature as a function of higher doses?of the inoculum. The highest total nitrogen (3.6%) and potassium (1.67%) content were obtained from Trichoderma treatment,?while the highest phosphorus (0.47%) content was obtained from Bacillus treatment. This?implied that microbial consortia could improve the quality and availability of composted nutrients in addition to the effectiveness of agricultural waste management and soil fertility practices. However, more research should be conducted?to determine the optimal microbial mixtures for various conditions of composting and the quality of the best compost produced.  
Respon Pertumbuhan dan Ketahanan Jagung Pada Cekaman Unsur Hara di Lahan Organik Silvani, Rafli; Sudrajat, Denny; Priyadi, Priyadi; Dulbari, Dulbari
Agritrop : Jurnal Ilmu-Ilmu Pertanian (Journal of Agricultural Science) Vol. 22 No. 2 (2024): Agritrop: Jurnal Ilmu-Ilmu Pertanian
Publisher : Universitas Muhammadiyah Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32528/agritrop.v22i2.2354

Abstract

Lahan organik memiliki ketersediaan nutrisi yang berbeda dengan lahan konvensional, karena praktik pemupukan yang kurang, sehingga cekaman unsur hara terjadi ketika tanaman tidak mendapatkan cukup nutrisi yang diperlukan. Faktor-faktor seperti keberadaan bahan organik, dekomposisi, topografi, dan struktur tanah mempengaruhi ketersediaan unsur hara bagi tanaman. Tanaman jagung merupakan salah satu tanaman yang sensitif terhadap kekurangan unsur hara. Oleh karena itu perlu dilakukan penilaian untuk mengetahui pengaruh cekaman unsur hara di lahan organik terhadap pertumbuhan tanaman jagung dan varietas jagung yang mampu bertahan terhadap cekaman tersebut. Penelitian dilakukan di lahan organik Polinela Organic Farm pada bulan September hingga Desember 2023. Varietas jagung yang  digunakan dalam penelitian ini, yaitu varietas F1 jagung putih Arumba dan varietas F1 jagung manis Exotic Pertiwi. Parameter pengamatannya antara lain tinggi tanaman, jumlah daun, leaf area index, waktu bunga jantan keluar, bobot batang basah, dan bobot batang kering. Analisis data hasil penelitian menggunakan Rancangan Acak Kelompok (RAK) dan Uji T-Test. Hasil menunjukkan tidak ada perbedaan signifikan antara kedua varietas pada parameter jumlah daun, leaf area index, bobot batang basah, dan bobot batang kering, kecuali pada tinggi tanaman dan munculnya bunga jantan memiliki perbedaan yang signifikan. Rata-rata tinggi tanaman varietas F1 jagung putih Arumba sebesar 148,75 cm, sedangkan varietas F1 jagung manis Exsotic Pertiwi sebesar 111,3 cm. Sedangkan  rata-rata waktu  muncul bunga jantan varietas F1 jagung putih Arumba lebih cepat yaitu 45,5 hari. Sedangkan rata-rata varietas F1 jagung manis exsotic pertiwi 51,3 hari.
PENDAMPINGAN PEMBUATAN DAN TEKNIK APLIKASI NANOEMULSI PESTISIDA NABATI UNTUK PENGENDALIAN HAMA DAN PENYAKIT PADA TANAMAN PADI DI KELOMPOK TANI TRI JAYA PEKON AMBARAWA, KABUPATEN PRINGSEWU Nuryanti, Ni Siluh Putu; Mutaqin, Zainal; Dulbari, Dulbari; Sudrajat, Denny; Maharani, Juwita Suri; Ardiansyah, Sigit
Jurnal Pengabdian Nasional Vol 6 No 1 (2025)
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/jpn.v5i2.4222

Abstract

Kelompok Tani Tri Jaya masih sangat tergantung terhadap pestisida kimia. Penggunaan pestisida kimia berdampak negatif terhadap lingkungan sehingga, perlu adanya perubahan pola sistem budidaya yang ramah lingkungan dan terintegrasi yaitu menggunakan pestisida nabati. Tujuan dari pelaksanaan PkM adalah melakukan transfer teknologi pengendalian hama bagi petani padi melalui pendampingan pembuatan dan teknik aplikasi nanoemulsi pestisida nabati untuk pengendalian hama dan penyakit pada tanaman padi di kelompok tani tri jaya di pekon ambarawa, kecamatan ambarawa, kabupaten pringsewu. Alat yang digunakan adalah proyektor, laptop, gelas ukur, sprayer, homogenizer, kamera, alat tulis. Bahan diperlukan antara lain aqudes, tween-80, produk minyak atsiri, dan kuisioner. Tahapan yang digunakan yaitu persiapan, pelatihan dan pendampingan dan evaluasi. Hasil evaluasi yang diperoleh yaitu sebelum dilakukan kegiatan pendampingan kelompok tani tri jaya belum memahami tentang teknik aplikasi nanoemulsi pestisida nabati untuk pengendalian hama dan penyakit pada tanaman padi. Setelah dilakukan pendampingan kelompok tani tri jaya tertarik untuk menerapkan aplikasi nanoemulsi pestisida nabati untuk pengendalian hama dan penyakit pada tanaman padi. Kata kunci: nanoemulsi, hama, penyakit, pestisida nabati
PENENTUAN UMUR PANEN BEBERAPA GENOTIPE PADI (Oryza sativa L.) BERDASARKAN SATUAN PANAS PADA SISTEM BUDIDAYA ORGANIK DAN NON ORGANIK Putri, Della Alvia Kusuma; Dulbari, Dulbari; Sudrajat, Denny; Subarjo, Subarjo; Jaya, Moh. Haris Imron S.
JURNAL AGROTROPIKA Vol. 24 No. 2 (2025): Jurnal Agrotropika Vol 24 No 2, Oktober 2025
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v24i2.11235

Abstract

Determining the harvest time of rice plants is one of the determining factors for the success of rice production. Calculation of harvest time can be done using the heat unit method. This study aims to calculate the accumulation of heat units of several rice genotypes (Oryza sativa L.) in organic and non-organic cultivation systems. This study was conducted in September-December 2023 at Polinela Organic Farm (POF), Lampung State Polytechnic (5°21'10"S 105°13'43"E, 114 m above sea level using a Randomized Complate Block Design (RCBD) with four rice genotypes (PTP 01, Inpari 24, Jaliteng, and Pandan Wangi), which were planted in two different cultivation systems and replicated three times. The results showed that the four rice genotypes used showed significant differences in the accumulation of heat units between organic and non-organic cultivation systems. Organic cultivation systems require a higher average heat unit (1193.1°C days) than non-organic systems (1146.3°C days). Organic cultivation systems provide more stable growth in grain weight per panicle, the number of filled grains per panicle, and fewer empty grains. This demonstrates the importance of genotype selection and cultivation system in optimizing production and harvest time.
Co-Authors ardiansyah, sigit Buana, Arum Sekar Dulbari, Dulbari Evi Yunita Sari, Evi Yunita Jaya, Moh. Haris Imron S. Maharani, Juwita Suri Mutaqin, Zainal Ni Siluh Putu Nuryanti Priyadi Priyadi Priyadi Priyadi Putri, Della Alvia Kusuma Rahmadi, Rizky Rochman, Fajar Silvani, Rafli subarjo, Subarjo Surahman, Suryansyah