CAJ | 학술논문

为研究紫花苜蓿(Medicago sativa)和菊苣(Cichorium intybus)叶片生长和光合生理对不同用量保水剂的适应能力和生理响应机制,以不施保水剂作为对照(CK),测定了施用不同用量保水剂(15 kg · hm~(-2),30 kg · hm~(-2))条件下大田种植的紫花苜蓿(Medicago sativa)和菊苣(Cichorium intybus)的比叶面积和光合特性.结果表明,保水剂对紫花苜蓿的比叶面积无显著影响(P>0.05),但对菊苣的比叶面积具有显著影响(P<0.05).对紫花苜蓿而言,保水剂施用量为15 kg · hm~(-2)时,其P_n、g_s和WUE均显著高于对照(P<0.01),但施用量为30 kg · hm~(-2)处理时,其P_n、和g_s均显著低于对照处理(P<0.01),但是却维持较高的WUE;对菊苣而言,施用保水剂降低了其P_n和T_r(P<0.01),但WUE与对照无显著差异(P>0.05),这表明紫花苜蓿和菊苣采取两种不同的生理适应策略来适应变化了的水分环境条件.紫花苜蓿P_n与g_s、P_n与T_r的相关性均以保水剂施用量为30 kg · hm~(-2)处理最紧密(P<0.01),而P_n与WUE的相关性则以对照最为紧密,依次为15 kg · hm~(-2)处理和30 kg · hm~(-2)处理;菊苣P_n与g_s、Tr和WUE的相关性强弱均表现为15 kg · hm~(-2)处理<30 kg · hm~(-2)处理<对照,表明保水剂影响叶片气体交换参数之间的关系.研究表明,不同植物叶片参数和光合特性对保水剂的响应并不具有一致性,植物可以根据环境条件的变化调节其形态和生理过程,以维持其正常生长.
위연구자화목숙(Medicago sativa)화국거(Cichorium intybus)협편생장화광합생리대불동용량보수제적괄응능력화생리향응궤제,이불시보수제작위대조(CK),측정료시용불동용량보수제(15 kg · hm~(-2),30 kg · hm~(-2))조건하대전충식적자화목숙(Medicago sativa)화국거(Cichorium intybus)적비협면적화광합특성.결과표명,보수제대자화목숙적비협면적무현저영향(P>0.05),단대국거적비협면적구유현저영향(P<0.05).대자화목숙이언,보수제시용량위15 kg · hm~(-2)시,기P_n、g_s화WUE균현저고우대조(P<0.01),단시용량위30 kg · hm~(-2)처리시,기P_n、화g_s균현저저우대조처리(P<0.01),단시각유지교고적WUE;대국거이언,시용보수제강저료기P_n화T_r(P<0.01),단WUE여대조무현저차이(P>0.05),저표명자화목숙화국거채취량충불동적생리괄응책략래괄응변화료적수분배경조건.자화목숙P_n여g_s、P_n여T_r적상관성균이보수제시용량위30 kg · hm~(-2)처리최긴밀(P<0.01),이P_n여WUE적상관성칙이대조최위긴밀,의차위15 kg · hm~(-2)처리화30 kg · hm~(-2)처리;국거P_n여g_s、Tr화WUE적상관성강약균표현위15 kg · hm~(-2)처리<30 kg · hm~(-2)처리<대조,표명보수제영향협편기체교환삼수지간적관계.연구표명,불동식물협편삼수화광합특성대보수제적향응병불구유일치성,식물가이근거배경조건적변화조절기형태화생리과정,이유지기정상생장.
This study was conducted to investigate the response of specific leaf area (SLA) and photosynthesis of Medicago sativa and Cichorium intybus grown under field environmental conditions to the super absorbent polymer (SAP). The SAP was added to the soil at the following rates: 0 (CK), 15 kg · hm~(-2) and 30 kg · hm~(-2). The results showed that the SAP had no significant effect on the SLA of Medicago sativa(P>0.05), while it had significant effect on that of Cichorium intybus(P<0.05). Applied with 15 kg · hm~(-2) of SAP, Medicago sativa had higher P_n, g_s and WUE than the CK significantly(P<0.01), but when applied with 30 kg · hm~(-2) of SAP, its P_n and g_s were significantly lower than that of the CK(P<0.01), maintaining with high WUE;for Cichorium intybus, the P_n and T_r were lower after applied with SAP, but there is no significant difference between its WUE and that of the CK(P>0.05), indicating that these two species responded to the changed water environmental conditions by taking two different physiological reactions respectively. The correlations between P_n and g_s, P_n and T_r of Medicago sativa applied with 30 kg · hm~(-2) of SAP were the most closely connected(P<0.01), while the correlation between P_n and WUE of the CK were the most closely connected, next were the treatments with 15 kg · hm~(-2) and 30 kg · hm~(-2) of SAP respectively;for Cichorium intybus, the connections of correlations between P_n and g_s, Tr and WUE all showed in the following order: treatment with 15 kg · hm~(-2) of SAP< treatment with 30 kg · hm~(-2) of SAP