石羊河流域下游白刺平茬复壮试验研究

Research on Nitraria scrub Stubble Recovery in Downstream Shiyang River Basin

白刺是石羊河下游沙区常见的植被恢复与重建的优良灌木。通过设置不同的平茬处理,研究平茬对白刺萌芽期、新枝生长、生物量、土壤水分的影响。研究结果表明:0 cm、2 cm和5 cm处理对平茬后的新枝萌芽期影响相对较少,8 cm和10 cm处理对萌芽期影响相对较大,平茬后新生枝萌芽比对照(CK)平均推迟了13.8 d。平茬处理后,新枝主枝长增长效果排序为5 cm>8 cm>10 cm>2 cm>0 cm;干枝生物量大小排序为5 cm>8 cm>10 cm>2 cm>0 cm;干根生物量大小排序为5 cm>10 cm>2 cm>8 cm>0 cm;干叶生物量大小排序为5 cm>10 cm>8 cm>0 cm>2 cm。从白刺平茬后整体效果来看,5 cm处理后的新生枝生长及生物量均比其他处理效果好。

Nitraria scrub is the good shrub vegetation restoration and reconstruction of Shiyang river sand area.By setting different crop processing,the flat crop of Nitraria bud,influence of the new branch growth,biomass,and soil moisture were research.Research shows that 0 cm,2 cm and 5 cm treatment on the stubble after shoots sprouting period relatively few effects,8 cm and 10 cm treatment on the germination period of relatively large impact,stubble after new branches sprout than control（CK） average delay of 13.8 d.The stubble after treatment of branch length,branch growth order of the effect of 5 cm8 cm10 cm2 cm0 cm; branch diameter growth order of the effect of 5 cm8 cm2 cm10 cm0 cm; stock biomass the order： 5 cm8 cm10 cm2 cm0 cm; root biomass size order： 5 cm10 cm2 cm8 cm0 cm.From Nitraria stubble after overall effect,5 cm after treatment with the new shoot growth and biomass were higher than those of other good treatment effect.