ABSTRAK Jagung (Zea mays L.) adalah salah satu komoditas pertanian yang digunakan sebagai bahan pangan dan memiliki manfaat yang cukup banyak. Data produksi Indonesia tertinggi ditemukan di Jawa Timur. Kabupaten Malang adalah salah satu daerah penghasil jagung tertinggi di Jawa Timur, tetapi produksi dan produktivitas jagung di Kabupaten Malang telah berfluktuasi. Salah satu penyebab produksi jagung tidak stabil di Indonesia disebabkan oleh perubahan iklim akibat pemanasan global. Perubahan iklim yang memengaruhi lamanya musim hujan dan kemarau disebabkan oleh perubahan pola curah hujan. Tujuan dari penelitian ini adalah mengevaluasi apakah terjadi perubahan iklim pada tahun 1998-2017 di Kabupaten Malang dan mengetahui dampak perubahan iklim terhadap musim tanam dan produktivitas jagung di Kabupaten Malang. Penelitian dilakukan pada FebruariMei 2018 di Kecamatan Donomulyo, Dau, dan Kasembon, Kabupaten Malang. Penelitian ini dilakukan dengan metode survei menggunakan data primer dan sekunder. Hasil penelitian menunjukkan bahwa iklim di Kabupaten Malang Utara telah mengalami perubahan, yang ditandai dengan peningkatan curah hujan dan suhu bulanan dan perubahan jenis iklim, sedangkan di Selatan terjadi penurunan curah hujan bulanan, hari hujan bulanan, dan suhu. Curah hujan dan hari hujan tidak memengaruhi produktivitas jagung, sedangkan suhu memiliki korelasi dan memiliki pengaruh signifikan pada produktivitas jagung. Suhu berpengaruh positif pada produktivitas jagung dan diperoleh model estimasi pengaruh suhu pada produktivitas, yaitu Y=-38552+1836 X. Dampak perubahan iklim adalah terjadinya pergeseran pada awal musim hujan dan musim kemarau. yang menyebabkan perubahan musim tanam jagung.Kata kunci: musim tanam, perubahan iklim, produktivitas jagung ABSTRACT Maize (Zea mays L.) is one of the agricultural commodities used as food and has quite a lot of benefits. The highest Indonesian production data is found in East Java. Malang Regency is one of the highest maize-producing areas in East Java. However, the production and productivity of maize in Malang Regency has fluctuated. One of the causes of unstable maize production in Indonesia is climate change due to global warming. Climate change that affect the length of the rainy and dry season is change in rainfall patterns. The purpose of this research is evaluating whether climate change occurred in 19982017 in Malang Regency and to know the impact of climate change on the growing season and corn productivity in Malang Regency. The study was conducted from February to May 2018 in Donomulyo, Dau, and Kasembon sub-district, Malang Regency. The research was carried out by survey method using primary and secondary data. The results showed that the climate in the North Malang Regency had undergone a change, which was marked by the increase in rainfall and monthly temperature and changes in climate type, while in the South it was marked by the decrease in monthly rainfall, monthly rainy days, and temperatures. The elements of rainfall and rainy days do not affect maize ...
A research to reduce application of N inorganic fertilizer through combination of inorganic-organic N and EM4 on eggplant has done on paddy field in Poncokusumo, Malang Regency, East Java, from June to September 2013. The experiment used a randomized complete block design with two factors and three replications. The first factor was the combination of inorganic-organic N fertilizer, ie. 100% urea, 75% urea + 25% goat manure, 50% urea + 50% goat manure, and 25% urea + 75% goat manure . The second factor was dose of EM4, ie. 10, 20, and 30 liters EM4 ha -1 . The results showed a reduction in the proportion of urea up to 50% and replace it with goat manure resulted growth and fruit yield of eggplant better than the others. The application of 100% urea gave the lowest fruit yield. Application of EM4 on eggplant enhanced growth and increased fruit yield. EM4 application with doses of 30 liters ha -1 resulted the highest fruit yield, accelerate the decomposition and mineralization of N.
This research was conducted to increase production of eggplants through combination of N-source and number of main branch has done on the field of andosol in Poncokusumo -Malang, 600 m asl, pH 5.4, from August to December 2013. The experiment used a Randomized Complete Block Design with 2 factors and 3 replications. Factor 1 was proportion of inorganic -organic N fertilizer (138 kg N ha -1 ): 100% Urea, 75% Urea + 25% goat manure, 50% Urea + 50% goat manure, and 25% Urea + 75% goat manure. Factor 2 was number of main branches: 1, 2 and 3 main branches.Results showed that there was no interaction effect between treatment combinations of organic-inorganic sources of N and the number of main branches to all observed variables. Treatment using the combination of 75% Urea + 25% goat manure increased the plant growth and gave the highest fruit yield (49.20 t ha -1 ) in comparison with combination using other fertilizers and 100% Urea. The lowest was derived from the application of 100% Urea, 35.61 t ha -1. Cultivation of eggplant with 3 main branches has resulted better growth and fruit yield than 1 and 2 main branches, 50.85, 47.91 and 30.79 t ha -1 , respectively.
<p style="margin-left: 0cm; margin-right: 0cm; text-indent: 0.5cm; margin-bottom: 0cm; line-height: 100%;" lang="id-ID"><span style="font-family: Souvenir Lt BT,serif;"><span style="font-size: small;">Tumpangsari tanaman jagung manis dan kedelai memiliki beberapa keuntungan, yaitu meningkatkan efisiensi penggunaan lahan, mengurangi serangan OPT, menambah kesuburan tanah terutama unsur Nitrogen dan mendapatkan hasil panen dari beragam komoditas. Tujuan penelitian adalah untuk mempelajari pengaruh jarak tanam tanaman jagung manis dan varietas tanaman kedelai terhadap pertumbuhan dan hasil tanaman jagung manis dan kedelai, serta mengetahui Nisbah Kesetaraan Lahan<em> </em>(NKL) pada sistem tanam tumpangsari. Penelitian dilaksanakan di KP Muneng, Kecamatan Sumberasih, Kabupaten Probolinggo pada bulan Januari hingga April 2016. Penelitian menggunakan rancangan acak kelompok faktorial diulang tiga kali. Faktor ke-1 adalah jarak tanam jagung (80 cm× 20 cm, 100 cm × 20 cm, dan 120 cm × 20 cm), dan faktor ke-2 adalah varietas kedelai (Dena 1, Dena 2 dan Burangrang). Hasil penelitian menunjukkan bahwa tumpangsari jagung manis dengan kedelai pada jarak tanam jagung yang diuji tidak berpengaruh terhadap pertumbuhan dan hasil kedua tanaman. Hasil jagung manis tertinggi diperoleh pada jarak tanam 80 cm × 20 cm. Hasil biji kedelai varietas Dena 1, Dena 2 ,dan Burangrang pada sistem tanam tumpangsari dengan jagung manis dengan jarak tanam antar baris jagung 80-120 cm tidak berbeda. Efisiensi penggunaan lahan tertinggi diperoleh pada tumpangsari jagung manis dengan jarak tanam 80 cm × 20 cm dan varietas kedelai Dena 2, tetapi yang mempunyai kelayakan ekonomi tertinggi adalah dengan kedelai varietas Burangrang.</span></span></p>
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