不同草种单播草坪蒸散量与脯氨酸含量的研究

对草地早熟禾、多年生黑麦草、高羊茅、狗牙根、结缕草和野牛草6种常见草坪草草坪的蒸散量进行的研究表明在充分灌水的条件下，冷地型草坪的蒸散量显著大于暖地型草坪（P〈0．01）；三种冷地型草坪问差异较小；暖地型草坪中狗牙根和结缕草的蒸散量显著高于野牛草（P〈0．01）．限制灌水条件下，6种草坪的蒸散量差异均显著（P〈0．05或0．01），其顺序为：高羊茅〉早熟禾〉黑麦草〉狗牙根〉结缕草〉野牛草．结缕草蒸散量在一天内随温度的升高而增加，但在温度维持在较高时由于气孔关团导致蒸腾降低从而蒸散量降低．五种草坪草脯氨酸含量顺序为高羊茅〉多年生黑麦草〉草地早熟禾〉结缕草〉狗牙根．

A Study on the ET of Different Turf- grass Species

The ET of six different turf-grass species in Beijing was studied.The result showed that ET was higher significantly in cool-season turf-grass than in warm-season turf-grass under sufficent irrigation(P<0.01).Among three cool-season turf-grass,ET difference not significantly (P<0.01).The ET of Cynodon dactylon cv Sun city and Zoysica sinica was higher significantly than that of Buchloe dactyloides (P<0.01) in the warm-season turf-grass,In the condition of limit irrigation,the difference between six turf-grass species was significantly(P<0.05 or P<0.01).The order of ET Festuca arundinacea cv Pixie>Poa Pratensis cv Midnight>Lolium Perenne cv Pickwick>Cynodon dactylon cv Sun city>Zoysica sinica>Buchloe dactyloides.Under water stress condition,the order of the Proline content in the six turf species leaf is:Festuca arundinacea cv Pixie>Lolium Perenne cv Pickwick>Poa Pratensis cv Midnight>Zoysica sinica>Cynodon dactylon cv Sun city.