| 1. | We still skim the backwaters of ponds and streams for the seed of betula, acer salix and populus species .
我们仍然要在池塘的静水上和溪流中捞取桦木，槭树、杨、柳等树的种子。 |
| 2. | Study on the single - line biomass of clone of populus
杨树无性系单株生物量研究 |
| 3. | Growth characteristics of one - year group seedling of populus tremulagigas
生组培苗生长特性 |
| 4. | Explosion pulping of triploid populus tomentosa carrat low pressure
三倍体毛白杨低压爆破制浆研究 |
| 5. | The experiment of grafting populus cathayana stump onto populus tomentosa
杨树伐根嫁接毛白杨试验初报 |
| 6. | Fractal characteristics of tree crown of populus xiaozhuanica in shelterbelts
林带小钻杨树冠的分维结构 |
| 7. | The competition - density effect in populus euramericana cv . ' san martion ' plantations
72杨林的竞争密度效应 |
| 8. | Discussion on introduction and seedling - culture of populus tomentosa triploid
三倍体毛白杨引种育苗试验研究 |
| 9. | Trapping effects of populus canadensis bundles on helicoverpa armigera in field
加拿大杨枝把田间诱蛾效果观察 |
| 10. | The estabishment of regeneration system on disease - resistant populus tomentosa carr
抗病毛白杨茎尖的组织培养 |
