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岩生植物金发草生长发育对水分的响应 被引量:6

Growth of Rock Plant Pogonatherum paniceum under Different Soil Moisture Content
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摘要 在透光棚玻璃中,采用称重补水法将土壤含水量保持在:2%(θ1)、4%(θ2)、6%(θ3)、8%(θ4)、10%(θ5)、15%(θ6)、20%(θ7)、25%(θ8)、田间持水量(θ9)9个梯度,研究了不同土壤含水量条件下岩生植物(rock plant)金发草(Pogonatherum paniceum)生长对水分的响应,分析了不同土壤含水量对金发草生长高度,分蘖,分叶,生物量等生长指标的影响.结果表明,在土壤含水量为6%时,金发草仍然能保持正常生长;土壤含水量为极低的2%和4%时,金发草也能存活生长1月之久;在土壤含水量为20%时,金发草生长迅速,高度,分蘖,分叶,生物量等指标均为最高. Soil moisture content was controlled separately at 2 % ( θ1 ), 4 % ( θ2), 6 % ( θ3 ), 8 % ( θ4 ), 10 % (θ5), 15 % (θ6), 20 % (θ7), 25 % (θ8), field moisture capacity(θ9), and Pogonatherurn paniceurn grown under these soil water conditions were studied. The height, tillow, delamination, weight of Pogonatherum paniceum were recorded to observe the effect of soil moisture content to Pogonatherum paniceurn' s growth. The results showed that under low soil moisture content 6 %, Pogonatherurn paniceum could grow normally, and under lower soil moisture content 2 % and 4 %, it could surviveand grow a month long. Under soil moisture content 20 %, Pogonatherum paniceum growed best.
出处 《四川大学学报(自然科学版)》 CAS CSCD 北大核心 2006年第5期1142-1145,共4页 Journal of Sichuan University(Natural Science Edition)
关键词 岩生植物 金发草 土壤含水量 rock plant Pogonatherum paniceum gsoil moisture content
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