Biochar application in Calliandra calothyrsus plantation management

Intensive loblolly pine (Pinus taeda L.) plantation management in the southeastern United States includes mid-rotation silvicultural practices (MRSP) like thinning, fertilization, competitive vegetation control, and their combinations. Consistent and well-designed long-term studies considering interactions of MRSP are required to produce accurate projections and evaluate management decisions. Here we use longitudinal data from the regional Mid-Rotation Treatment study established by the Plantation Management Research Cooperative (PMRC) at the University of Georgia across the southeast U.S. to fit and validate a new dynamic model system rooted in theoretical and biological principles. A Weibull pdf was used as a modifier function coupled with the basal area growth model. The growth model system and error projection functions were estimated simultaneously. The new formulation results in a compatible and consistent growth and yield system and provides temporal responses to treatment. The results indicated that the model projections reproduce the observed behavior of stand characteristics. The model has high predictive accuracy (the cross-validation variance explained was 96.2%, 99.7%, and 98.6%; and the prediction root mean square distance was 0.704 m, 19.1 trees ha−1, and 1.03 m2ha−1 for dominant height (DH), trees per hectare (N), and basal area (BA), respectively), and can be used to project the current stand attributes following combinations of MRSP and with different thinning intensities. Simulations across southern physiographic regions allow us to conclude that the most overall ranking of MRSP after thinning is fertilization + competitive vegetation control (Fert + CVC) > fertilization only (Fert) > competitive vegetation control only (CVC), and Fert + CVC show less than additive effect. Because of the model structure, the response to treatment changes with location, age of application, and dominant height growth as indicators of site quality. Therefore, the proposed model adequately represents regional growth conditions.

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Persistence of the Swiss Needle Cast Outbreak in Oregon Coastal Douglas-Fir and New Insights from Research and Monitoring

Journal of Forestry ◽

10.1093/jofore/fvab011 ◽

2021 ◽

Author(s):

David C Shaw ◽

Gabriela Ritóková ◽

Yung-Hsiang Lan ◽

Doug B Mainwaring ◽

Andrew Russo ◽

...

Keyword(s):

Climate Change ◽

Regional Scale ◽

Emerging Diseases ◽

Douglas Fir ◽

Landscape Patterns ◽

Needle Cast ◽

Plantation Management ◽

Environmental Controls ◽

Swiss Needle Cast ◽

Improvement Programs

Abstract Swiss needle cast (SNC), caused by Nothophaeocryptopus gaeumannii, is a foliage disease of Douglas-fir (Pseudotsuga menziesii), that reduces growth in native stands and exotic plantations worldwide. An outbreak of SNC began in coastal Oregon in the mid-1990s and has persisted since that time. Here we review the current state of knowledge after 24 years of research and monitoring, with a focus on Oregon, although the disease is significant in coastal Washington and has recently emerged in southwestern British Columbia. We present new insights into SNC distribution, landscape patterns, disease epidemiology and ecology, host-pathogen interactions, trophic and hydrologic influences, and the challenges of Douglas-fir plantation management in the presence of the disease. In Oregon, the SNC outbreak has remained geographically contained but has intensified. Finally, we consider the implications of climate change and other recently emerged foliage diseases on the future of Douglas-fir plantation management. Study Implications: Douglas-fir tree growers need to consider Swiss needle cast (SNC) and other emerging foliage diseases as SNC has not abated over the past 24 years, and along with other emerging diseases, it continues to pose a threat to Douglas-fir plantation productivity. Douglas-fir management in western Oregon remains important, such that a knowledge of disease impacts and effective silvicultural responses is key. Managers should carefully consider whether alternative species may be ecologically or economically beneficial in some situations while tree improvement programs must continue to breed for tolerance to SNC. Research shows that regional scale foliage disease outbreaks can result in trophic cascades and hydrologic changes that affects more than just the trees. The environmental controls on the SNC epidemic imply that climate change could strongly influence future directions of the outbreak, with the greatest threats to trees at higher elevations.

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Abolition and Plantation Management in Jamaica, 1807-1838

Hispanic American Historical Review ◽

10.1215/00182168-2802786 ◽

2014 ◽

Vol 94 (4) ◽

pp. 699-700

Author(s):

R. Marquese

Keyword(s):

Plantation Management

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POTENSI KALIANDRA (Calliandra calothyrsus) DAN GAMAL (Gliricidia sp.) DI DAERAH ISTIMEWA YOGYAKARTA UNTUK PENGEMBANGAN PELET KAYU

AGRIFOR ◽

10.31293/agrifor.v20i1.4924 ◽

2021 ◽

Vol 20 (1) ◽

pp. 71

Author(s):

Ahdiar Fikri Maulana ◽

Singgih Utomo ◽

Puji Lestari ◽

Ridla Arifriana ◽

Norma Aji Candra Dewi ◽

...

Keyword(s):

Calliandra Calothyrsus

Negara-negara di dunia, khususnya Eropa, Jepang, Korea Selatan dan China, mulai beralih ke penggunaan energi terbarukan yaitu pelet kayu. Indonesia dengan iklim tropis, keanekaragaman jenis tanaman dan ketersediaan lahan untuk pengembangan sumber energi ini, berpeluang menjadi salah satu produsen utama pelet kayu, baik untuk memenuhi permintaan nasional atau internasional. Daerah Istimewa (DI) Yogyakarta merupakan salah satu provinsi di Indonesia yang memiliki hutan rakyat dan berpeluang untuk dikembangkan sebagai produsen pelet kayu. Penelitian ini bertujuan untuk memperoleh informasi awal tentang jenis tanaman kayu potensial di DI Yogyakarta. Pengambilan data dilakukan dengan studi pustaka dan survey kepada Kelompok Tani Hutan (KTH) di Kabupaten Bantul (22 KTH), Gunungkidul (15 KTH), Kulonprogo (15 KTH) dan Sleman (19 KTH). Cabang dan ranting kering merupakan sumber bahan bakar kayu utama bagi KTH di DI Yogyakarta, tanpa melihat jenis tanamannya. Jenis kaliandra (Calliandra calothyrsus) dan gamal (Gliricidia sp.) sebagai jenis potensial untuk pelet kayu ditanam sebagai sumber hijauan makanan ternak, sumber nektar untuk peternakan lebah madu dan untuk konservasi tanah. Kedua jenis ini ditanam sebagai tanaman tepi di pinggir lahan, diantara tanaman pertanian dan atau tanaman berkayu, bukan sebagai tanaman utama. Jumlah yang ditanam sangat variatif berkisar antara 0 - 2000 pohon kaliandra/ha dan 0 - 3000 pohon gamal/ha. Berdasarkan hasil tersebut diketahui bahwa jenis potensial untuk produksi pelet kayu, kaliandra dan gamal sudah ditanam di 4 kabupaten tersebut. Namun penanaman kedua jenis tersebut perlu dikembangkan agar dapat mendukung produksi pelet kayu.

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Evaluation of potential and local forages nutrition as ruminant feed-in Payo Agro-Tourism Area, Solok City, West Sumatera, Indonesia

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/888/1/012055 ◽

2021 ◽

Vol 888 (1) ◽

pp. 012055

Author(s):

Adrizal ◽

Roni Pazla ◽

Riesi Sriagtula ◽

Adrinal ◽

Gusmini

Keyword(s):

Crude Protein ◽

Gliricidia Sepium ◽

Survey Method ◽

Calliandra Calothyrsus ◽

Panicum Maximum ◽

Nutritional Content ◽

Corn Straw ◽

Bidens Pilosa ◽

West Sumatra ◽

Ruminant Feed

Abstract This study aims to evaluate local forage’s potential and nutritional content in the Payo agro-tourism area of Solok, West Sumatra, Indonesia, to be used as a ruminant feed. This study used a survey method by taking a sample of the forage that grows a lot in the area and then analyzed its nutritional content. The nutritional content analyzed were dry matter, ash, crude protein, crude fiber, crude fat, calcium, and phosphorus minerals. At the same time, the TDN value and the extracted material without nitrogen were calculated based on the formula. The results showed that 12 types of forage have the potential as ruminant feed, namely Panicum maximum, Tithonia diversifolia, Gliricidia sepium, Digitaria sp, Centrocema pubescens, Calliandra calothyrsus, Stachytarpheta jamaicensis, Bidens pilosa, Ipomea triloba, Micania Scandens, Asystasia gangetica, and corn straw. This study shows that Calliandra calothyrsus has the highest crude protein content, and Corn straw contains the lowest crude protein. The highest and lowest TDN values were Gliricidia sepium and Panicum maximum, respectively. Through the linear programming program, these 12 plants can be formulated into 4 ration formulations with 58% TDN and 15-16% crude protein.

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