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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 composting rates (0,0.8%, 2%, 6% and 10%) on the growth and photosynthetic characteristics of three turf grasses (TFFs, Lolium perenne and Kentucky bluegrass) were studied.The results showed that: The best effect was obtained at the dosage of 6% .The plant height, single leaf area and single plant biomass of tall fescue, ryegrass and bluegrass increased significantly with the increase of sludge compost application, and the ratio of root to shoot decreased significantly , The plant height increase was 64.9% ~ 180.8%, 97.3% ~ 200.9% and 39.1% ~ 156.5%, respectively. The single leaf area increment was 91.3% ~ 417.4%, 186.4% ~ 394.9% and 164.6% ~ 508.3% The biomass increased from 333.4% to 867.6%, from 138.4% to 445.1% and from 316.3% to 669.2%, respectively.With the increase of sludge compost application, the net photosynthetic rate (Pn), intercellular CO2 concentration Tr and WUE increased firstly and then decreased; Pn, Tr and WUE of Poa pratensis increased gradually, Ci increased first and then decreased; Pn and WUE of ryegrass increased gradually, but Ci And Tr increased firstly and then decreased.The contents of chlorophyll a, b and (a + b) in three species of grass increased with the composting of sludge, and the content of chlorophyll a, b and (a + b) But chlorophyll a / b change is not Significantly.