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污泥堆肥对草坪草生长及光合特征的影响 被引量:10

Effects of sewage sludge compost on the growth and photosynthetic characteristics of turfgrass
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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 Ciand 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.
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