1 84k
84k belong to Korea S. one white poplar hybridization asexual department, The color of trunk is dark green and smooth, the trunk is smooth, The cover is blue
, green and grey . round, front side is dark green , the back is covered with dense white hair, and then come off gradually. 84k is male asexual department, no" fly to wadding" , don't pollute the environment. So 84k is fine afforestation seeds, beautiful afforestation seeds
84k root system is developed, afforest survival rate is even high; The nursery stock is great in growing amount. According to test 84k Yang annual shoot average high reach 3.48-3. 69m, foot-path reach 2.10-2.20cm . The nursery of water with good fat condition , annual
heigth of shoot can be more than 4.5; The growing amount of nursery stock far exceeds America and Europe rapid growing Yang . 84k resist leaf rust ,lamina black rot, foxiness disease.
2.2001yang
Middle forest 2001 Yang show as trunk perfectly straight and roundness, The top advantage is obvious, besides that it possess the general characteristic of black Yang in America: the growing amount is great, become a useful tree early, afforest survival rate is high, Its leading indicator exceeds the international improved variety that our country mainly planted at present ,compared with America and Europe( sand blue Yang, 214 Yang) and America dark Yang( 69 Yang, 72 Yang) , material accumulate growing amount raise more than 15-20%, annual tree high on average more than 3 meters, the highest can up to 4.5 meters , 4.0
cm of foot-paths of chest, each produce material 0.6-1.8 steres per
year, Density of each timber basis raises 0.008 , afforest survival rate raise by 10-30%. Resist the wind , the moth, foxiness disease . count with a rate of disease-resistant worm, improve the main resistant-disease worm quality by 80-100%; resist cold to raise by 90-100%. The timber fibre is 1.009-1.19 mm. long.
Adapt to range from Xinjiang , Inner Mongol district of temperate climate in the north, to the subtropical zones, warm temperate climate districts , namely Beijing, Tianjin, Jin , Ji, Henan , Anhui, Su, tibet, gansu, Shanxi, Ningxia, Inner Mongol, Xinjiang.
3、107yang
107 poplar body tall , big and perfectly straight, bark grey and relatively coarse, branch angle relatively little, The leaf is small and dense, the tree crown is narrow, the growing amount is great. Chest foot-path annual can reach 3.5-4 cm,70% bigger than 1-214 Yang ; Tree high in one year more than 2.8-3 meters ,30% higher than 1-214 Yang. Its fibre length is 1.145 mm , go beyond 1-214 Yang 135%, timber density goes beyond 101%.
107 Yang compare by seedling stage, asexual department of the past ten years with woods test and
area test , behave well, demonstrate that this seeds are grown rapidly, fine characteristic. it will become the North including the shelter belt of the Northwest, one of the main afforestation seeds of the commercial forest of our country easily, of high quality, high- efficient and vegetative propagation.
107 Yang is suitable for yellow River district , sea river valley and Liaohe River valley to plant extensively, And it is also introduced as a fine variety in the places, such as Xinjiang, the Inner Mongol, Shanxi, Ningxia, Gansu, Chongqing,etc..
4South resist Yang the 1-4th
seed selection of South resist Yang serial variety start 1983, with 1-69 Yang being as female parent, 1- 63 Yang as male parent, control and pollinate while being artificial in greenhouse , the ones that have been watched for many years and have chosen had:
(1)south resist No.1,including two pieces asexual
department, namely: a、b;
Resist No. 1 a ( 34-17): height of tree can be up to 19.92 in 9 year, 36-67
cmof foot- paths of chest, accumulated material of single up to 0.4867 cubic meters; Worm's density of hole is 0, suitable for fostering the plywood .
Resist No. 1 b ( 34-135): height of tree can be up to 20.37 in 9, 29.33
cmof foot- paths of chest, accumulated material of single can be up to 0.4556 cubic meters; Worm's density of hole is 0, suitable for fostering the plywood .
(2)Resist No.2 ( 34-314): height of tree can be up to 19.75
tall in 9, 30.88 cm of foot-paths of chest, accumulated material of single can be up to 0.5026 cubic meters, Most suitable for making paper pulp.
(3)Resist N0.3 ( 34-188): Planted in 1987, height of trees can be up to 19.6 meters in 8 years, 27.8
cm of foot-paths of chest, Single s of material are accumulated can be up to 0.3984 cubic meters, worm's density of hole is 0, perfectly straight , Suitable for making plywood . The timber is fine and smooth and pure white, there is not black heart material.
(4)Resist No.4 ( 37-33): height of tree can be 21.1 meter within 8 year, chest of foot-path is 26.85 cm ,accumulated material of single can be up to 0.3970 steres within 8 year, worm's density of hole is 0, perfectly straight , suitable for making plywood . The timber is fine and smooth and pure white, without black heart material. Suitable every province of midstream and downstream of the Changjiang River and close to the Yellow River valley, HuaiHe valley and jianhan district.
5、2025yang
Middle forest 2025 Yang black yang bastard, male one, does not fly wadding , Suitable for planting in environmental protection in urban and rural areas. The leaf is big, fallen leaves are late, the growing amount is very surprising , It is higher by 30% than the middle forest 46, the trunk is perfectly straight and roundness, the top advantage is remarkable, The density of timber and fibre length are superior to rapid growing Yang. It is the good
timber to make plywood and papermaking . |
