Soil Amendments Reduce Roof Garden Weight and Influence the Growth Rate of Lantana
Soil Amendments Reduce Roof Garden Weight and Influence the Growth Rate of Lantana
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土壤改良剂可减轻屋顶花园的重量并影响马缨丹的生长速度
DOI：
10.21273/hortsci.38.4.618
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发表时间：
2003
期刊：
影响因子：
1.9
通讯作者：
Chronopoulos Ioannis
中科院分区：
文献类型：
--
作者：
Nektarios Panayiotis;Tsiotsiopoulou Panayiota;Chronopoulos Ioannis
对4种基质作为屋顶花园营养层的效果进行了研究。基质由砂壤土(S)、以60~40 v/v的脲醛树脂泡沫(S：F)改良的沙壤土、以50~30~20 v/v的泥炭和珍珠岩(S：P：PER)改性的沙壤土和以60~40 v/v的尿素树脂泡沫(P：F)改性的泥炭组成。在40厘米处充满空气的孔隙率，pH和EC。与对照(S)相比，在田间条件下，S：F、S：P：PER和P：F基质的重量分别减少了16.8%、23.9%和70.3%。与对照基质S相比，S：F、S：P：PER和P：F基质的体积密度分别降低了46%、43%和95%。在40 cm处，S：F基质的充气孔隙率略有增加，而P：F基质的充气孔隙率显著增加。电导率在S和S：P：PER基质中降低，而在S：F和P：F基质中增加。植株生长监测指标为新梢长度、新梢数、主枝直径和花蕾数。基质S和S：F的植株生长相似，而基质S：F促进开花。基质S：P：PER在前6个月诱导植株生长缓慢，随后逐渐增加，最终生长令人满意，与S和S：F基质相当。底物P：F不支持足够的植物生长，只有在需要减轻屋顶花园重量的特殊情况下才应考虑使用。
Four substrates were investigated for their efficacy as roof garden vegetative layers. The substrates comprised a sandy loam soil (S), sandy loam soil amended with urea formaldehyde resin foam (S:F) in a proportion of 60-40 v/v, sandy loam soil amended with peat and perlite (S:P:Per) in a proportion of 50-30-20 v/v and peat amended with urea formaldehyde resin foam (P:F) in a proportion of 60-40 v/v. The substrates were evaluated for their physical and chemical properties and their capacity to sustain growth of Lantana camara L. Physical and chemical evaluation included weight determination at saturation and at field capacity, bulk density determination, water retention, air filled porosity at 40 cm, pH and EC. When compared to the control (S) a weight reduction of 16.8%, 23.9% and 70.3% was obtained at field capacity with S:F, S:P:Per and P:F substrates respectively. Bulk density was reduced by 46%, 43% and 95%, in substrates S:F, S:P:Per and P:F, respectively, compared to the control substrate S. Air-filled porosity at 40 cm was slightly increased for substrate S:F while it was substantially increased for substrate P:F. The pH response between the initiation and the termination of the study was similar for the four substrates. EC decreased in substrates S and S:P:Per but increased in substrates S:F and P:F. Plant growth was monitored as shoot length, shoot number, main shoot diameter and the number of buds and flowers. Substrates S and S:F resulted in similar plant growth, while substrate S:F promoted flowering. Substrate S:P:Per induced slow plant growth during the first 6 months which subsequently increased resulting in a final growth that was satisfactory and comparable to the S and S:F substrates. Substrate P:F did not support sufficient plant growth and its use should be considered only in special cases where reduced weight of the roof garden is imperative.