摘要
五节芒(Miscanthus floridulus)是一种广泛分布于我国亚热带地区的乡土植物,具有耐涝抗旱降污的特性。以五节芒为试验材料,通过盆栽模拟实验,研究其在浙南山地水库消落带生境与非消落带生境中生长的五节芒植株在经受长时间淹水胁迫后,植株根际土壤酶活性的变化动态。结果表明:随着淹水时间的延长,消落带生境和非消落带生境中五节芒根际土壤过氧化氢酶、蔗糖酶、酸性磷酸酶活性都呈下降趋势。消落带生境中的过氧化氢酶活性始终高于非消落带生境中的过氧化氢酶活性,而根际土壤蔗糖酶和酸性磷酸酶活性要始终低于非消落带生境。说明消落带生境中生长的五节芒在淹水条件下,对土壤中有毒物质过氧化氢的清除能力要大于非消落带生境。而消落带生境中相对低的蔗糖酶和酸性磷酸酶活性能缓慢消耗淹水植株体内贮存的营养物质和能量,提高五节芒植株的抗淹能力。
Miscanthus floridulus is a kind of plant that is widely distributed in the subtropical region of China and has the ability of waterlogging tolerance,drought resistance and reducing pollutants.With Miscanthus floridulus growing in water-level-fluctuation zone and non-water-level-fluctuation zone in Changtan reservoir,choosing the southern part of Zhejiang province as the experimental to study the rhizospheric soil enzyme and fertility under different submergence duration.The results showed that with the increasing of submergence duration,the activity of soil catalase,soil sucrase and soil acid phosphatase all appeared to be a decreasing trend.Under submergence,activity of hydrogen peroxide of Miscanthus floridulus growing in water-level-fluctuation zone was higher than that growing in non-water-level-fluctuation zone,while the activity of rhizospheric soil sucrase and soil acid phosphatase of Miscanthus floridulus growing in water-level-fluctuation zone was lower than that growing in non-water-level-fluctuation zone during submergence.The results indicated that the hydrogen peroxide scavenging enzymes activity of Miscanthus floridulus growing in water-level-fluctuation zone was higher than that growing in non-water-level-fluctuation zone under submergence.Tolerance to submergence in Miscanthus floridulus growing in water-level-fluctuation zone was higher than that growing in non-water-level-fluctuation zone,which would consume nutrient and energy stored in plants during submergence more slowly and enhance the capacity of waterlogging resistance of Miscanthus floridulus.
作者
陈海生
梁国钱
CHEN Haisheng;LIANG Guoqian(Zhejiang Tongji Vocational College of Science and Technology,Hangzhou 311233,China)
出处
《生态科学》
CSCD
2020年第6期69-74,共6页
Ecological Science
基金
浙江省科技厅公益性项目(LGN18C030002)。
关键词
五节芒
消落带
土壤过氧化氢酶
土壤蔗糖酶
土壤酸性磷酸酶
Miscanthus floridulus
water-level-fluctuation zone
soil catalase
soil sucrase
soil acid phosphatase
