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DocumentOther documentGrowth performance of the Teak's (Tectona grandis Linn.f) different planting stocks
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.The growth of plantation is dependent on a complex series of interactions between genetics and environmental factors, and the planting stocks including planting methods. For the successful establishment of a plantation, the economically effective means should be explored, as teak plantation is being established in Myanmar especially for commercial purposes including forest rehabilitation purposes. This study was conducted in the 12 years old Teak plantation that was established in compartment No. 24 of Ngalaik Reserved Forest and managed by Forest Research Institute. This plantation was established with different planting stocks; tissue culture seedling, shoot cutting seedling, potted seedling, fresh stump seedling, and grafted seedling in 2008. The main objective of this trial is to explore the growth performance of Teak plantation by applying the different planting stocks. Randomized completely block design (RCBD) was used with 5 replications (5 blocks). In one block, there are 5 plots in which totally of 49 trees were planted in each sub-plot with 2.7 m by 2.7 m spacing. There was a total of 1,225 planted trees in this trial. As a preliminary step, in 2019 through the measurement data, the total basal area of trial area (0.92 ha) is 16.46 m2 (17.89 m2 ha-1), the total volume is 96.47 m3 (104.86 m3 ha-1) [here calculated cone factor = 0.359822 is used], and mean annual increment (MAI) is 9.53 m3 ha-1 yr -1. Among the different planting stocks, the potted seedling plant was significantly better in growth as compared to those of other planting stocks, nonetheless, survival percentages among them were not significant. Now, we conduct this follow-up study to explore the growth performance of this 12 years old teak plantation of different planting stocks. We expect this study’s findings will be supported the useful and applicable information for the commercial plantation program to raising environmentally friendly and economically successful teak plantations. Keywords: Sustainable forest management, Deforestation and forest degradation, Research ID: 3485372 -
ArticleJournal articleAssessment of enrichment planting of teak (Tectona grandis L.f.) in degraded dry deciduous dipterocarp forest in the Central Highlands, Viet Nam
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.After years of unsustainable logging, dry deciduous dipterocarp forest (DDDF) has become poor in timber stocks and has been converted to industrial crops such as rubber. The objectives of this study were to assess teak (Tectona grandis L.f.) tree establishment under degraded DDDF conditions and to determine factors that influence the suitability of teak as a forest enrichment tree species. A set of 64 experimental plots of 4900 m2 each was set up and observed for 4–5 years for testing enrichment planting with teak under various combinations of two groups of factors: ecological conditions and forest status. Weighted, non-linear, multivariate regression models were used to detect key factors that influenced the suitability of teak. The results showed that at the age of 4 years the average dominant tree height (defined as 20% of the tallest trees in the experimental plot) reached 11.2, 7.8, 5.3 and 3.8 m for very good, good, average, and poor suitability levels, respectively. Survival rates of planted teak from average to very good suitability levels were over 90%. Six key factors that affected the suitability of teak were waterlogging during the rainy season, altitude, stand volume of the degraded DDDF, soil type, percentage of sand and concentration of P2O5 in the soil. Under the extreme ecological and environmental conditions of the DDDF, enrichment planting with teak gave promising results. Keywords: degraded dipterocarp status, dipterocarp enrichment, teak suitability assessment. ID: 3472951 -
ArticleJournal articleCharacteristics of growth and heartwood formation in planted teak in South China
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Dominant trees in 31 and 32 years old teak plantation were selected for trunk analysis to study the growth process and heartwood formation characteristics by scanning the disk with scanner and measuring the data with software. The results showed that tree height at the early growth stage (1 to 8 years) was more than that of the DBH (1 to 4 years) for 4 years. The middle growth stage of DBH (5 to 18 years) (stable growth stage) was longer than that of tree height (9 to 13 years) for 9 years. The average growth curve of the volume was not intersected with annual growth curve, which indicated that 31 years old teak plantation had not reached maturity age. The total number of annual rings and the number of heartwood rings were decreased with the increase of tree height, while the number of sapwood rings at different heights changed little. The number of sapwood rings below 16 m of trunk varied about 8 rings, and began to decrease gradually over 16 m. The diameters of xylem, heartwood and sapwood at different heights showed the same trend as the ring, the sapwood width below 22 m was stable, and decreased gradually above 22 m. Affected by taperingness, the heartwood area was larger than sapwood below 10 m, but smaller above 10m. There was a significant positive correlation between the number of heartwood rings with xylem age, diameter of heartwood and xylem diameter (p < 0.01). The growth of dominant tree DBH and tree height in teak plantation began to decline at 18 and 13 years respectively, the current growth and predicted maximum growth were still far lower than cultivation target (DBH ≥ 60cm). The heartwood formation of teak was positively correlated with the diameter growth. It is necessary to breed and utilize teak varieties with small taper and thinning should be done from 13 years for reserved dominant trees. Keywords: Tectona grandis L. f.; dominant tree; stem analysis; growth process; heartwood; sapwood ID: 3619031
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Book (stand-alone)Manual / guideSoil testing methods manual
Doctors Global Programme – A farmer-to-farmer training programme
2020Also available in:
The Soil Doctors programme is developed under the umbrella of the Global Soil Partnership and promotes the establishment of a farmer-to-farmer training system. The Soil Doctors Global Programme aims to build the capacity of smallholder farmers on the practice of sustainable soil management and, by doing so, support governmental agencies and organizations working on agricultural extension at the field level (promoting broader impact and a reduction of costs). Trainings will also rely on the establishment of demonstration farms and experimental fields by the Soil Doctors, which might attract the interest of research institutes and universities involved in the programme. The programme also aims to educate farmers on soil science principles for practices of sustainable soil management and aims to achieve this by providing them with a set of tools composed of some educational materials and a soil testing methods (STM) manual for preliminary soil analysis. The STM is a collection of locally relevant, and easy to use, soil analyses procedures that would be selected by each area where the program is implemented. -
BookletCorporate general interestEmissions due to agriculture
Global, regional and country trends 2000–2018
2021Also available in:
No results found.The FAOSTAT emissions database is composed of several data domains covering the categories of the IPCC Agriculture, Forestry and Other Land Use (AFOLU) sector of the national GHG inventory. Energy use in agriculture is additionally included as relevant to emissions from agriculture as an economic production sector under the ISIC A statistical classification, though recognizing that, in terms of IPCC, they are instead part of the Energy sector of the national GHG inventory. FAO emissions estimates are available over the period 1961–2018 for agriculture production processes from crop and livestock activities. Land use emissions and removals are generally available only for the period 1990–2019. This analytical brief focuses on overall trends over the period 2000–2018. -
BookletHigh-profileFAO Strategy on Climate Change 2022–2031 2022The FAO Strategy on Climate Change 2022–2031 was endorsed by FAO Council in June 2022. This new strategy replaces the previous strategy from 2017 to better FAO's climate action with the Strategic Framework 2022-2031, and other FAO strategies that have been developed since then. The Strategy was elaborated following an inclusive process of consultation with FAO Members, FAO staff from headquarters and decentralized offices, as well as external partners. It articulates FAO's vision for agrifood systems by 2050, around three main pillars of action: at global and regional level, at country level, and at local level. The Strategy also encourages key guiding principles for action, such as science and innovation, inclusiveness, partnerships, and access to finance.