沙棘、柠条和侧柏抗旱能力对比试验

Drought Resistance Comparative Test of Seabuckthorn,Caragana korshinskii and Oriental Arborvitae

为进一步探究沙棘、柠条和侧柏的抗干旱能力,选择2年生沙棘扦插苗和2年生柠条、侧柏播种苗,对3个树种的光合生理指标和水分生理指标进行了测试,分析了3个树种的抗旱能力。试验结果表明,侧柏相对于沙棘和柠条具有更好的抗旱能力,同一时期内,侧柏的含水量、束缚水和自由水比值和临界饱和亏数值最大。因此,侧柏在3个树种中更具备抗旱耐贫瘠能力,在青海省互助县荒山造林、干旱半干旱地区造林中应该优先考虑使用侧柏。

In order to further explore anti-drought ability of seabuckthorn,Caragana korshinskii and oriental arborvitae,twoyear-old cutting seedlings of seabuckthorn and two-year-old sowing seedlings of Caragana korshinskii and oriental arborvitae were selected to study photosynthetic and hydropathic indexes of three tree species,drought resistance of three species were further analyzed. Results showed that oriental arborvitae had better drought resistance than that of seabuckthorn and Caragana korshinskii,arborvitae water content,irreducible water and free water ratio and critical saturation loss value of oriental arborvitae were the largest at same period. So oriental arborvitae of three tree species had more drought resistant barren capacity,use of oriental arborvitae should be given priority in afforestation of Huzhu county.