川中丘陵区高富集氮、磷沟渠植物的筛选

Screening for high nitrogen and phosphorus enrichment ditch plants in the Hilly Area of Central Sichuan Basin

选择7种川中丘陵区常见沟渠植物（酸模、菖蒲、黑麦草、水芋、美人蕉、水蓼、野薄荷）作为研究对象,盆栽试验研究了不同植物对氮、磷的吸收能力,以期筛选出适应川中丘陵区沟渠生长的高富集氮、磷植物。结果表明：（1）不同沟渠植物地上部生物量（以干质量计）为0.43~1.38kg/m2,其中美人蕉最大,菖蒲最小。（2）不同沟渠植物地上部全氮为4.50~14.35g/kg,其中水芋最高,水蓼最低;不同沟渠植物地上部全磷为0.80~2.15g/kg,其中水芋最高,野薄荷最低。（3）不同沟渠植物地上部全氮吸收量为2.88~15.66g/m2,其中美人蕉最高,其次为水芋;不同沟渠植物地上部全磷吸收量为0.48~2.04g/m2,其中美人蕉和水芋地上部全磷吸收量最高,水蓼、黑麦草和酸模次之,菖蒲和野薄荷最低。

Seven local ditch plant species （Rumex L. ,Acorus calamus L.,L. perenne,Colocasia esculenta （L.） Schoot , Canna indica L., Pol ygonum h ydropi per and Mentha ha plocal yx Briq.） were selected to test their uptake abilities of nitrogen （N） and phosphorus （P） in the ditch systems in the Hilly Area of Central Sichuan Basin. Results showed that these ditch plant species were able to grow well under designed water N and P concentrations during the experimental period. Growth of Mentha haplocalyx Briq. was constrained by high N and P concentrations. Aboveground biomass of the seven plant species ranged from 0.43 kg/m2 to 1.38 kg/m2 over a 50 d growing period, with the highest and lowest aboveground biomass for Canna indica L. and Acorus calamus L. ,respectively. The plant N and P contents ranged from 4.50 g/kg to 14.35 g/kg and 0.80 g/kg to 2.15 g/kg,respectively. The corresponding plant N and P uptakes were in the range of 2.88-15.66 g/m2 and 0.48-2.04 g/m2 ,respectively.