摘要
本文研究了巴天酸模的生理生态学特性。结果表明:巴天酸模蒸腾强度日变化为双峰型曲线。蒸腾强度随着光照强度和气温的升高而增加,4月份平均值0.743g/gFW.h,5月份1.118,6月份1.613。叶片含水量的复化较小,4—6月份在87.63—88.08％之间变动。水分饱和亏缺低,4—6月份在12.6—13.6％之间。可见,巴天酸模调节水分平衡的能力很强,具有恒水植物的明显水分稳定性,因此能广泛地生长在不同水分条件的生境中。巴天酸模营养生长期(4—5月)叶片的光合产物高,净光合强度达到8.7—14.63mgDW/dm^2.h,叶片最厚,达2,913.41mgDW/cm^2,而再花结果期(6月)嘎片光合产物低,净光合强度为4.93mgDW/dm^2.h,叶片最薄,为2.15mgDW/cm^2。意味着营养生长期营养物质含量高,表明再花期到来之前,营养价值最高,是饲用的最佳期。
The daily change of the transpiration rate for Rumex patientia could be fitted into a normal double-peak curve. It increased as the increase of light intensity and temperature. The mean transpiration rate(g.g_1 FW.h_1was 0.743 in April, 1.118 in May, and 1.613 in June. The water contents in the leaves were 87.63-88.08% and water deficits were 12.6-13.6% in the peridod of April-June. The net photosynthetic rate(mgDW.dm.h) and leaf thickness(mgDW.cm) were the highest at the vegetative growth and less at the flowering and fruiting stages. They reached 8.79-14.63, 2.91-3.41, and 4.93,2.15, respectively, these indicated that the vegetative growwth stage was the best period for harvesting Rumex patientia for forage.
出处
《草业科学》
CAS
CSCD
北大核心
1991年第3期17-21,共5页
Pratacultural Science
关键词
巴天酸模
饲用植物
生理学
生态学
Rumex patinetia
forage
transpiration rate
net photosyntheic rate
