Land Reclamation in Northern vegetation restoration measures after

Abstract The selection of species, vegetation, etc. are introduced after the river sloping land reclamation and restoration of vegetation shelter construction techniques to the rehabilitation of vegetation restoration and soil conservation areas provide a reference.

Keywords: land reclamation; vegetation restoration; shelter construction; in Northern

In recent years, with the industrialization and the acceleration of urbanization and land desertification and other natural disasters, China's cultivated land area is decreasing. Land reclamation as an important measure to increase the cultivated area will be implemented in various places. Reclamation Main is the original waste ditch, waste pond formation, outside the planning to demolish the buildings to increase the cultivated area, but will also land in accordance with the standards of modern agriculture re-planning, scheduling River and re-excavation and ditch order to meet the needs of modern agriculture [1-2]. but because of the overall planning and construction, leading to the original surface protective layer is damaged, experiencing heavy rain and other natural disasters, the ditch will be excavated on the slope caused by the new erosion , leading to ditch sediment deposition, directly affect the rehabilitation outcome [3-4]. now with the ground reality, the vegetation restoration measures are summarized below.

1, and species selection of herbaceous vegetation recovery
1.1 herbaceous vegetation species selection
Dominated by sandy soils in Northern, mostly river bottom mud slope, and its high salt content, so the slope reclamation of vegetation after the main limiting factor is soil salinity. In the selection of plants salinity species of plants should be chosen through its growth and salt absorption from the soil, thereby reducing the salt content in the soil. In order to ensure the success of planting and get a good protective effect, the best choice for local Saline Soil . in common in Northern and easy to collect seed alkali plants Artemisia Saline, sesbania (also known as alkali green beans or flood). According to the survey, use of Sesbania planted on saline land, can significantly reduce the plow layer soil salinity, the topsoil salinity decreased 30% to 50%.

1.2 The restoration of the grass vegetation
Slope in the river after reclamation, the first one should be grown in salinity of the main plants. By planting, on the one hand to prevent soil erosion, on the other hand can promote new vegetation reclaimed river slope. Meanwhile, adsorption plants to reduce soil salinity, along with annual rainfall are Northern 1 100 mm or so, through the rain washing can further reduce soil salinity. Therefore, when planted in the ground should not be large Loosen the soil area, can take the fish-scale pit soil preparation methods block site preparation; sufficient in the case of provenance, or by drilling or sowing in the form of the prepared base of Artemisia seeds of Sesbania or direct seeding to the slope . sown in the summer usually, if the project is the end of the summer, and autumn planting time can be changed.

2 of farmland shelterbelts
Suitable herbs grown by 1 to 2 years after the salt content of the soil down to the growth of fast growing species below the 0.1% required to fast-growing trees can be planted. According to the requirements of planning and design in the new excavation poplars were planted along river should be 2 lines, specific measures are as follows.

Links to Research Papers Download http://www.hi138.com 2.1 seedlings selected poplar species and
Dominated by sandy soils in Northern, natural climatic conditions better, with the coastal warm temperate and subtropical transitional climate, mild temperatures and abundant rainfall, water supply, and coordination of the season for poplar growth. According to this Soil and climate characteristics, suitable for fast growing construction in Northern varieties of poplar shelterbelt should be 69, 72 Young, 35 Young, 95 Yang and the main varieties. seedling height of 3.5 m general should be chosen more successful, straight stem form , 4 cm above the roots, shoots bend, the terminal bud full, no mechanical damage and pests of annual seedlings, 1 year 2 Nian-gen dry seedlings better.

2.2 Planting time
Should generally be conducted in the spring planting in the northern Jiangsu coastal areas, the local temperature reaches above 0 �� and afforestation can be sustainable to the end of April. But for the small forest area, labor surplus areas, planting time in late autumn for the best choice, specific time in late October to early November. because then shoot to stop the growth of poplar seedlings began to leaf, while the underground pArt of the growth has not been stopped, choose this time to favor planting seedlings after transplanting in spring next year to advance its root and leaf .

Planting density of 2.3
Shi Ying Yang Shulin create multiple lines with small spacing, large spacing Jinxing planting, the small spacing for Yang Shu high growth in timber tip to Jiangdi degrees, while the growth �� spacing Zeweiyangshu maintain sufficient nutrition space. Under the reclamation both sides of the planting design standards Hedao 2 rows of poplar, poplar growth nutrition Kongjianbushi Yingxiang poplar growth of the main factors, reasonably determine the spacing that enhancing its growth and increase the protective capacity of the key. through years of practice compared to plant 2 poplar lines should be used 2 m �� 3 m in the spacing is appropriate. in the plant, the first line 1 should be planted along the mouth line, Line 2 Line 1 should be planted in 2 m at the bottom. For the higher water level of rivers, planting pan up the location should be appropriate to ensure that the trees planted roots in the summer when high water would not soak in water and affect the normal growth.

2.4 Planting Method
As the soil to sand, so their methods can not be used before planting frozen pond open approach should be adapted to local conditions, the use of open pond side planting methods. Because of rapid water loss of sand, if frozen pond will be open soil water loss caused pool, a place in the absence of irrigation, nursery stock when planting to the pool but will result in water back in seedlings, resulting in dehydration death of seedlings, thus affecting the survival rate of afforestation. planting should also be a "two-step three-buried mention Miao, "the planting method.


3 References
[1] TRANSACTIONS, HE Nikko, early shellac. PArticipatory concepts and methods of land reclamation [J]. Geography and Geographic Information Science, 2003,19 (1) :96-99.

[2] Pan Guoan, Meng Quan. Shoal grass and pasture land reclamation method [J]. Aquaculture Technical Advisor, 2008 (2) :40-41.

[3] Feng Jinshan, Zhang Lei. Yangquan Coal Waste Reclamation of grass [J]. Shanxi Agricultural University: Natural Science, 1995,15 (4) :370-374.

[4] Jin Zhinan, Lin large instrument. Herbage Waste Dump Reclamation Project in Shanxi Province in ecological Research [J]. Shanxi Agricultural University: Natural Science, 1991,11 (3) :201-207.

Links to Research Papers Download http://www.hi138.com