摘要
研究不同污泥堆肥施用量(0、0.8%、2%、6%和10%)对高羊茅、黑麦草和早熟禾3种草坪草生长及光合特征的影响.结果表明: 污泥堆肥施用量为6%时效果最好.随污泥堆肥施用量的增加,高羊茅、黑麦草和早熟禾的株高、单叶面积和单株生物量均显著增加,根冠比显著降低,其中,株高增幅分别为64.9%-180.8%、97.3%-200.9%和39.1%-156.5%,单叶面积增幅分别为91.3%-417.4%、186.4%-394.9%和164.6%-508.3%,单株生物量增幅分别为333.4%-867.6%、138.4%-445.1%和316.3%-669.2%.随污泥堆肥施用量的增加,高羊茅净光合速率(Pn)、胞间CO2浓度(Ci)、蒸腾速率(Tr)和水分利用效率(WUE)呈先增加后降低的趋势;早熟禾Pn、Tr和WUE逐渐增加,Ci呈先增加后降低的趋势;黑麦草Pn和WUE逐渐增加,但其Ci和Tr呈先增加后降低的趋势.污泥堆肥施用使3种草叶绿素a、b和(a+b)含量增加,施用量〉6%后叶绿素a、b和(a+b)含量下降,但叶绿素a/b变化不明显.
The effects of different dosages (0, 0.8%, 2%, 6% and 10%) of sewage sludge compost on the growth and photosynthetic characteristics of three turfgrass, i.e., Festuca arundinacea, Lolium perenne and Poa pratensis were studied. The results showed that the dosage of 6% had the optimal effects. The plant height, leaf area and dry biomass of three turfgrass increased significantly with the increasing sewage sludge compost dosage, while the root/shoot ratio decreased obviously. Compared with the control, the plant height of F. arundinacea, L. perenne and P. pratensis increased by 64.9%-180.8%, 97.3%-200.9% and 39.1%-156.5%, the leaf area per plant increased by 91.3%-417.4%, 186.4%-394.9% and 164.6%-508.3% and the dry biomass per plant increased by 333.4%-867.6%, 138.4%-445.1% and 316.3%-669.2%, respectively. With the increasing dosage of sewage sludge compost, the net photosynthetic rate (Pn), transpiration rate (Tr), intercellular CO2 concentration (Ci) and water use efficiency (WUE) of F. arundinacea increased first and decreased then, the Pn, Tr and WUE of P. pratensis showed a significantly increasing trend, while the Ci decreased after an initial increase, and the Pn and WUE of L. perenne increased gradually, while the Ciand Tr decreased after a gradual increase. With the increasing sewage sludge dosage, the contents of chlorophyll a and b of the three turfgrass species increased markedly, and then decreased when the dosage was more than 6%, but the ratio of chlorophyll a/b was little changed.
出处
《应用生态学报》
CAS
CSCD
北大核心
2014年第9期2576-2582,共7页
Chinese Journal of Applied Ecology
基金
辽宁大学青年基金项目(2011LDQN04)
格平绿色助学行动-辽宁环境科研教育"123工程"项目(CEPF2011-123-1-3)
辽宁省博士启动基金项目(20121033)
沈阳市科技局项目(F11-264-1-02)资助
关键词
堆肥污泥
草坪草
生长
光合特征
sewage sludge compost
turfgrass
growth
photosynthetic characteristics.