八种抗旱材料组合对干旱矿区油松抗旱性的影响

Effect of Eight Kinds of Drought-resistant Materials Combination on Drought Resistance of Pinus tabulaeformis in Dry Mining Area

以50-80cm高油松幼苗为试材，选择保水剂、植物生长调节剂（GGR）、茵根剂、有机肥等抗旱材料，组成了保水剂（1#）、保水剂＋有机肥（2#）、保水剂＋GGR（3#）、保水剂＋GGR＋有机肥（4#）、保水剂＋茵根（5#）、保水剂＋茵根＋有机肥（6#）、保水剂＋GGR＋茵根（7#）、保水剂＋GGR＋茵根＋有机肥（8#）等8种抗旱材料组合，以空白处理为对照（CK），在山西大同某煤矸石山上进行现场栽植试验，研究测定了抗旱材料组合对土壤含水量、油松叶片相对含水量、叶片水分饱和亏、叶绿素含量、相对电导率、油松存活率和保存率以及油松株高生长量等指标的影响。结果表明：与CK相比，各材料组合均能使油松的保存率、株高生长量得到明显的提高；在控水条件下，土壤含水量、叶片相对含水量以及叶绿素含量均有明显的上升，叶片水分饱和亏、叶片相对电导率分别比CK有不同程度的降低，都显示了一定的抗旱效果；其中，保水剂＋GGR＋菌根＋有机肥（8#）抗旱组合的抗旱效果最好，保水剂＋有机肥（2#）组合次之。

Taking 50-80 cm height of Pinus tabulaeformis seedling as material, water retention agent （1 #）, water retention agent ＋ organic fertilizer （2 # ）, water retention agent＋ GGR （3 #）, water retention agent＋ organic fertilizer ＋ GGR （4 # ）, water retention agent ＋ mycorrhizal （5 # ）, water retention agent ＋ organic fertilizer ＋ mycorrhizal （6 # ）, water retention agent＋GGR＋mycorrhizal （7 # ） ,water retention agent＋organic fertilizer＋GGR＋mycorrhizal （8 # ）, formed by water retention agent,plant growth regulator GGR,mycorrhizal agent and organic materials were selected to the field planting experiment in coal gangue mountain of Shanxi Datong, the effect of 8 kinds of different drought-resistant technologies combination on soil moisture content, leaf relative water content, leaf water saturation deficit, chlorophyll content, relative electrical conductivity, the survival rate of Pinus tabulaeformis and the plant height increment regularly were determined and studied. The results showed that compared with CK, the combinations could make the survival and plant height growth of Pinus tabulaeformis obviously improved~ under the condition of water controled, soil moisture content ,leaf relative water content and chlorophyll content had been obviously improved and leaf water saturation deficit and leaf relative electrical conductivity also reduced in different degree. To some extent, they all showed the effect of drought resistance. Among them,water retention agent＋organic fertilizer＋GGR＋mycorrhizal （8 # ） had the best effect of drought resistance,water retention agent＋organic fertilizer （2 # ） combination was the secend.