【摘要】 土壤有机质对冷地型草坪草种子产量的形成有实质性影响，在供试的４个品种（“鳄鱼”黑麦草、“得碧”黑麦草、“墨瑞特”早熟禾、“猎犬”高羊茅）中，其相关系数分别为０．９７，０．９８，０．９３和０．８８。各处理种子单产排序为：草—豆轮作＞草—豆间作＞蚕豆前茬地连作＞小麦前茬地连作，与极端产量比较，黑麦草高达２．４～３．２倍，早熟禾和苇状羊茅分别高出４２．３％～５５．９％和３８．６％～５１．３％。不同前茬地连作处理，蚕豆茬地明显优于小麦茬地，但从播后第３年起，黑麦草种子产量均呈逐年下降趋势，且以豆茬地更甚。更多还原

【Abstract】 Soil organic matter has substantial influence on seed yield of cool-season turfgrasses. In this study the correlation coefficient between the soil organic matter content and the yield was observed as 0.97, 0.98,0.93 and 0.88 for the tested varieties of "Galer" Lolium perenne, "Derby" L. perenne, "Merit" Poa pratensis and "Houndog" Festuca arundinacea, respectively. The seed yield showed a decreasing trend in order of the following treatments: 1) rotation between turfgrasses and broad bean; 2) intercropping of turfgrasses and broad bean; 3) continuous turfgrasses after broad bean; and 4) continuous turfgrasses after wheat. The difference between yield extremes was 140%～220% for Lolium perenne, 42.3%～55.9% for Poa pratensis and 38.6% ～51.3% for Festuca arundinacea. The seed yield of turfgrasses planted in succession to broad bean was significantly higher than those planted in wheat field after wheat crop. However, the seed yield of Lolium perenne started to decline since the third year of planting, and this trend was more dramatically showed in the case when the grass planted after broad bean.更多还原