Assessment of runoff nutrients loss in Phyllostachys praecox cv. prevernalis forest land under simulated rainfall conditions

Author(s):  
Peiguo Zhou ◽  
Donghui Zhang ◽  
Li Zhuang ◽  
Lei Zhang ◽  
Wenrui Yuan ◽  
...  
2019 ◽  
Vol 39 (8) ◽  
Author(s):  
王荣嘉 WANG Rongjia ◽  
高鹏 GAO Peng ◽  
李成 LI Cheng ◽  
刘潘伟 LIU Panwei ◽  
孙鉴妮 SUN Jianni ◽  
...  

Author(s):  
Sorin Geacu

The population of Red Deer (Cervus elaphus L., 1758) in Tulcea county (Romania) The presence of the Red Deer in the North-western parts of Tulcea County is an example of the natural expansion of a species spreading area. In North Dobrogea, this mammal first occurred only forty years ago. The first specimens were spotted on Cocoşul Hill (on the territory of Niculiţel area) in 1970. Peak numbers (68 individuals) were registered in the spring of 1987. The deer population (67 specimens in 2007) of this county extended along 10 km from West to East and 20 km from North to South over a total of 23,000 ha (55% of which was forest land) in the East of the Măcin Mountains and in the West of the Niculiţel Plateau.


1982 ◽  
Author(s):  
Thomas W. Birch ◽  
Thomas W. Birch
Keyword(s):  

2001 ◽  
Author(s):  
Thomas W. Birch ◽  
Brett J. Butler ◽  
Brett J. Butler

2009 ◽  
Vol 160 (8) ◽  
pp. 232-234
Author(s):  
Patrik Fouvy

The history of the forests in canton Geneva, having led to these being disconnected from productive functions, provides a symptomatic demonstration that the services provided by the forest eco-system are common goods. Having no hope of financial returns in the near future and faced with increasing social demands, the state has invested in the purchase of forest land, financed projects for forest regeneration and improvement of biological diversity and developed infrastructures for visitors. In doing this the state as a public body takes on the provision of services in the public interest. But the further funding for this and for expenses for the private forests, which must be taken into account, are not secured for the future.


2011 ◽  
Vol 162 (2) ◽  
pp. 27-31
Author(s):  
Daniel Häuptli

Could there be a win-win situation for both pension funds and the Swiss forestry sector? On the one hand, developments in the forestry sector suggest that the Swiss forest presents a new lucrative investment opportunity. If this is so, then pension funds could be particularly interested, as the low correlation between Swiss forest and other classes of investment, and the long investment periods involved are ideal for pension fund portfolios. On the other hand, large investments made by pension funds could mean that existing problems in Swiss forestry, in connection with its fragmented nature, could be more rapidly solved, and the potential for rationalization in the wood value chain could be fully realized. This would in turn make investments in the forest even more profitable. This hypothesis was investigated through a comprehensive literature analysis, yield calculations for private forestry enterprises of over 50 ha made by the Swiss Federal Office for Statistics 2004–2008, and an interview with the investments director of a large Swiss pension fund. Despite the optimistic assumption that the greater efficiency gained by the investment of pension funds into the forestry sector could lead to costs lower by 50% and a 20% increase in profits, the hypothesis must be rejected, because a calculated annual return of only 0.82% is too low for pension funds. The conclusion is that the price for forest land is high, and forest owners are not only interested in the monetary value of holding forest. Other immaterial values influence prices. It is suggested that a greater emphasis on socioscientific studies concerning the link between the price of forest land and the motivation to buy and sell forest could lead to some important findings.


1996 ◽  
Vol 33 (4-5) ◽  
pp. 297-301 ◽  
Author(s):  
Vít Sova

The influence of lime application to the acid soil on the mobility of phosphorus (P) in runoff was investigated by simulated rainfall in laboratory conditions. The neutralization of the acid soil by appropriate amount of lime significantly increased the portion of loosely bound phosphates in runoff sediment This phenomenon influenced bioavailability of P in runoff which increased after the lime application.


1974 ◽  
Vol 4 (4) ◽  
pp. 309-340
Author(s):  
B. Bruce Bare ◽  
James A. Ryan ◽  
Gerard F. Schreuder

2019 ◽  
Vol 5 (2) ◽  
pp. 48-53
Author(s):  
Afrital Rezki, S.Pd., M.Si ◽  
Erna Juita ◽  
Dasrizal Dasrizal ◽  
Arie Zella Putra Ulni

Perkembangan penggunaan tanah bergerak horisontal secara spasial ke arah wilayah yang mudah diusahakan. Penggunaan tanah juga bergerak secara vertikal dalam rangka menaikkan mutunya. Penelitian ini bertujuan untuk menganalisis pola penggunaan lahan, bagaimana manajemen penggunaan lahan di satu wilayah berdasarkan batas Nagari. Metode yang digunakan adalah analsisis spasial dengan interpretasi citra penginderaan jauh, survey lapangan, dan analisis deskriptif. Pertumbuhan pemukiman Nagari Sungai Sariak Kecamatan VII Koto Kabupaten Padang Pariaman mengakibatkan pemanfaatan ruang menjadi tumpang tindih. Diperlukan cara-cara pengelolaan dan managemen penggunaan tanah dalam rangka pembangunan berkelanjutan yang menaikkan taraf hidup masyarakat dan tidak menimbulkan kerugian lingkungan.Terdapat 9 jenis penggunaan lahan yang ada di Nagari Sungai Sariak. Penggunaan lahan tersebut adalah Primary Forest, Secondary Forest, Paddy Field, Settlement, Mixed Plantations, Crop Fields, Water Bodies, Bushes, dan Plantations. Penggunaan lahan yang paling luas di Nagari Sungai Sariak adalah jenis penggunaan lahan Primary Forest, sebesar 48% dari total luas wilayah Nagari Sungai Sariak. Pada tahun 2011 sampai tahun 2016, penggunaan lahan paling luas terjadi pada penggunaan lahan jenis Primary Forest yang kemudian menjadi Mixed Plantations. Land use Changes moved horizontally spatially towards areas that are easily cultivated. The land use also moves vertically in order to increase its quality. This study aims to analyze land use patterns, how land use management in one area is based on Nagari boundaries. The method used is spatial analysis with interpretation of remote sensing images, field surveys, and descriptive analysis. The growth of Nagari Sungai Sariak in Kecamatan VII Koto, Kabupaten Padang Pariaman resulted in overlapping use of space. Management methods are needed and management of land use in the framework of sustainable development that raises the standard of living of the community and does not cause environmental losses. There are 9 types of land use in the Nagari Sungai Sariak. The land uses are Primary Forest, Secondary Forest, Paddy Field, Settlement, Mixed Plantations, Crop Fields, Water Bodies, Bushes, and Plantations. The most extensive land use in Nagari Sungai Sariak is the type of Primary Forest land use, amounting to 48% of the total area of the Nagari Sungai Sariak. From 2011 to 2016, the most extensive land use occurred in Primary Forest land uses which later became Mixed Plantations.


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