Daun lamtoro (Leucaenaleucocephala) mengandung unsur hara N, P, dan K untuk menambah unsur hara pada tanaman.Penelitian ini bertujuan untuk mempelajari pemupukan organik cair (POC) daun lamtoro yang diaplikasikan pada berbagai waktu berbeda terhadap pertumbuhan dan hasil tanaman bawang daun (Allium fistulosum L.). Penelitian ini dilaksanakan di KebunPercobaan 2 STIPER Dharma Wacana Metro di Jalan Wana Bakti 3, KelurahanMargerejo, Kecamatan Metro Selatan,Kota Metro. Pelaksaan penelitian dilakukan pada bulan November 2021 – Januari 2022. Rancangan penelitian ini disusun secara faktor tunggal menggunakan Rancangan Kelompok Teracak Lengkap (RKTL) terdiri atas POC daun lamtoro 150, 300, dan 450 mL polybag-1 yang diaplikasikan dengan interval waktu pemberian masing-masing 5 hari sekali, 7 hari sekali,dan 9 hari sekali. Masing-masing kombinasi perlakuan diulang sebanyak 3 (tiga) kali, data yang diperoleh diuji dengan analisis ragam yang sebelumnya telah diuji homogenitasnya dengan uji Bartlet dan ketidakaditifan diuji dengan uji Tuckey dan dilanjutkan dengan perbandingan orthogonal kontras, semua pengujian dilakukan pada taraf nyata 5%. Hasil penelitian ini dapat disimpulkan bahwa pemberian POC daun lamtoro tidak menunjukkan pengaruh yang nyata terhadap semua peubah, yaitu: tinggi tanaman, jumlah daun, jumlah anakan, hasil tanaman per polybag, laju pertumbuhan relatif, laju asimilasi bersih, kecuali pada nisbah luas daun melalui uji ortogonal yang diberikan pada dosis 150 mL polybag-1 dengan interval waktu 7 hari sekali lebih tinggi 25,59% daripada pengaplikasian dosis 300 dan 450 mL polybag-1.
The purpose of the study was to determine the competitive and comparative advantages and sustainability of cassava farming in East Lampung Regency. The population of cassava farmers is 1,100 farmers using the Slovin formula, so a sample of 92 farmers is obtained. Sampling was done by purposive sampling technique. Data analysis used PAM (Policy Analysis Matrix) analysis. The results of the study were the PCR coefficient value of 0.3397 and the DRCR coefficient value of 0.1216. The coefficient value < 1 indicates that cassava farming in East Lampung Regency has a competitive advantage and a comparative advantage. The government needs to set a Regional Minimum Price (HMR) policy of Rp. 1,150/kg which aims to improve the welfare of farmers.
Tujuan penelitian adalah menganalisis pendapatan usahatani padi sawah dan menganalisis faktor-faktor sosial ekonomi yang mempengaruhi pendapatan usahatani padi sawah di masa pandemi covid-19. Analisis yang digunakan analisis pendapatan dan analisis regresi linier berganda. Teknik pengambilan sampel yaitu simple random sampling sebanyak 51 petani. Hasil penelitian yaitu pendapatan usahatani padi sawah sebesar Rp. 10,368,541.00 /ha/musim tanam dengan nilai R/C ratio sebesar 2,1 (menguntungkan). Faktor sosial ekonomi yang berpengaruh terhadap pendapatan usahatani padi sawah adalah luas lahan, harga pupuk organik, dan harga pupuk ponska, sedangkan faktor yang tidak berpengaruh nyata terhadap pendapatan usahatani padi sawah adalah tingkat pendidikan, harga pupuk kandang, harga pupuk urea, harga pupuk ZA, harga pupuk KCL, harga pestisida, jumlah anggota keluarga dan usia.
In lowland rice (Oryza sativa L.) cultivation, soil puddling will make rice roots easy to develop, making it easier to do seedling transplanting (Huang et al. 2016). However, plowing causes soil particles and nutrients to drift along with water flow. This results in increased water sedimentation and decreased decomposition rate of organic matter (Sharma and De Datta 1985). Therefore, it is not surprising that in many Asian rice-producing countries, the environmental damage to agricultural lands is directly or indirectly caused by intensive rice production with perfect soil tillage that has been happening for decades (Reddy and Hukkeri 1983).Weeds in lowland rice cultivation reduce rice yields not only because they compete for soil nutrients, moisture, and sunlight but also because they may be an alternate host for insects and diseases of rice. Normally, weed control requires a lot of labour (Lhungdim et al. 2019); hence the use of chemicals (herbicides) for weed control before planting worth to be trying (Gangireddy and Subramanyam 2020). The soil tillage activities for rice cultivation in paddy fields do not absolutely require tillage because the availability of water in paddy fields can actually help the puddling process (Prasanthkumar et al. 2021).
<p>The experiment was conducted to screen potentials indigenous fungi for rapid decomposing of rice straw. Seven isolates of dominant fungi were isolated from the burying rice straw on the 2.5 cm soil depth after 30 days incubation on the paddy fields. Five dominant isolates were tested for their potential to decompose rice straw by assessing their value of decreasing C/N ratio and dry weight of rice straw. Fungal inoculums treatments were arranged in a Completely Randomized Design with four replications. The results showed that the dominant cultivable fungi that isolated from decomposed rice straw were Trichoderma sp., Fusarium sp., Mucor sp., Aspergillus sp., and Penicillium sp. Among the tested fungi, Trichoderma sp. had the biggest ability to decompose rice straw compared to others indigenous fungi. The C/N ratio was reduced to 39.47 from an initial value of 73.33 of control treatment in 10 days of biodegradation process in laboratory scale, thus showing the potential of indigenous Trichoderma sp. for use in large-scale composting of rice straw.</p><p>Keywords: Cultivable, decomposer, indigenous fungi, rice straw</p><p>[<strong>How to Cite</strong>: Isnaini S, A Niswati and Maryati. 2012. Screening of Cultivatable Indigenous Fungi which Responsible for Decomposing of Rice Straw. J Trop Soils 17 (1): 61-66. doi: 10.5400/jts.2012.17.1.61]</p><p> </p><p>[<strong>Permalink/DOI:</strong> <a href="http://dx.doi.org/10.5400/jts.2012.17.1.61" target="_blank">www.dx.doi.org/10.5400/jts.2012.17.1.61</a>]</p>
Sistem tanam (ST) yang sering digunakan petani yaitu ST tegel. Sampai sekarang masih banyak petani yang menggunakan bibit lebih dari tujuh batang per lubang tanam (BpLT). Tujuan penelitian adalah untuk mempelajari respon tanaman padi terhadap ST dan jumlah bibit per lubang tanam (JBpLT). Penelitian dilakukan di Desa Raman Aji, Kecamatan Raman Utara, Lampung Timur pada bulan Februari sampai Mei 2016. Perlakuan disusun dalam Rancangan Kelompok Teracak Lengkap dengan pola split plot. Petak utama adalah ST jarwo 2:1, ST Jarwo 4:1, dan ST tegel 25 x 25 cm. Anak petak terdiri atas JBpLT: 1 BpLT, 2 BpLT, dan 3 BpLT. Data dianalisis ragam dan dilanjutkan uji orthogonal kontras, semua pengujian dilakukan pada taraf 5%. Hasil percobaan menunjukkan bahwa (1) ST jarwo 2:1 dan ST jarwo 4:1 meningkatkan pertumbuhan padi hibrida Mapan P-05 dibandingkan ST tegel 25 x 25 cm, (2) penanaman 1 BpLT meningkatkan komponen hasil padi dibandingkan penanaman 2 BpLT dan 3 BpLT, dan (3) penanaman 1 BpLT memberikan hasil GKG (6,86 t ha-1) yang lebih tinggi dari penanaman 2 BpLT (5,64 t ha-1) dan 3 BpLT (4,59 t ha-1) pada ST jarwo 2:1, ST jarwo 4:1 dan ST tegel 25 x 25 cm, secara berurutan.AbstractThe common planting system (PS) used by the farmers is Tegel system. Yet, many farmers still use more than seven seeds per planting hole (SpPH). The research objective was to study the reponse of rice plants to the planting system and the number SpPH. The research was conducted in Raman Aji Village, Raman Utara, East Lampung from February to May 2016. The treatments were arranged in a RCBD with a split plot pattern (the main plot were the PS i.e. jarwo 2: 1, jarwo 4: 1 and “Tegel” 25 x 25 cm; the subplots are the number of SpPH i.e. 1 SpPH, 2 SpPH, and 3 SpPH). The results showed that (1) the jarwo 2: 1 system increased rice growth compared to the 25 x 25 cm “Tegel”; (2) application of 1 SpPH increased the yield component of rice compared to planting 2 SpPH and SpPH; and (3) application of 1 SpPH (6.86 t ha-1) gave the higher weight of milled grain than using 2 SpPH (5.64 t ha-1) and 3 SpPH (4.59 t ha-1), both planted in the jarwo 2:1, jarwo 4:1 and 25 x 25 cm “Tegel” System
Mining causes destructive soil properties, especially soil texture, water retention, and transmission. Applying biochar is the best way to improve soil physical properties. A glasshouse experiment was conducted to evaluate the role of biochar on soil physical properties based on a Completely Randomized Design (CRD) with four replicates. The research comprised six treatments (0, 4, 8, 12, 16, 20 t biochar ha -1 ). The results showed that the ex-gold-mined soil had coarse soil texture (sandy loam), high Bulk Density (BD) (1.43 g cm -3 ), low Total Soil Pores (TSP) (46.45%), low soil organic matter (SOM) content (1.27 %), very fast hydraulic conductivity (198.8 cm h -1 ). After biochar incubation, SOM increased (to 3.11%), soil BD decreased (to 1.16 g cm -3 ), TSP increased (to 54.17 %), water retention increased (at pF 1.0, 2.0, 2.54, and 4.2), plant available water (PAW) increased (into 8.33 %), and hydraulic conductivity decreased (into 24.70 cm h -1 ). However, applying 20 t biochar ha -1 still needs to bring the soil physical properties of the ex-gold-mined soil back into suitable soil for farming land.
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