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植物研究 ›› 1990, Vol. 10 ›› Issue (3): 99-105.

• 论文 • 上一篇    下一篇

灌水施肥对羊草(Aneurolepidium chinense)草原群落光合速率的影响

戚秋慧, 盛修武, 姜恕   

  1. 中国科学院植物研究所,北京
  • 出版日期:1990-09-15 发布日期:2016-06-14

THE EFFECT ON COMMUNITY PHOTOSYNTHETIC RATE OF ANEUROLEPIDIUM CHINENSE AFTER IRRIGATION AND FERTILIZATION TREATMENTS

Qi Qiu-hui, Sheng Xiu-wu, Jiang Shu   

  1. Institute of Botany, Academia Sinica Beijing
  • Online:1990-09-15 Published:2016-06-14

摘要: 对天然羊草群落进行灌水和施肥后,测定了它们(灌水、灌水加施肥和对照)的群落光合速率。结果如下:1.在灌水、施肥加灌水处理后23天测定,处理群落的叶层高度分别比对照高8%和9%;群落LAI分别比对照高68.97%和99.93%;群落生物量分别比对照高41%和65.69%;群落日净光合量分别是对照的2.48倍和3.76倍;最大光合量分别是对照的2.82倍和3.12倍。2.灌水施肥处理后,羊草群落光合速率日变化的类型与对照基本一致,属于双峰型。唯独灌水加施肥群落(处理后3天)是单峰型,没有中午降低现象。看出较好的水肥条件能改变群落的日变化类型。3.在温湿度条件较差时或随着处理时间的推移,处理的效果越显著。第一阶段测定时,灌水、灌水加施肥处理的群落日净光合量分别是对照的1.26和1.17倍。第二阶段测定时,分别是对照的1.40和1.84倍。第三阶段测定时,分别是对照的2.48和3.76倍。

Abstract: After irrigation and fertilization, the photosynthetic rate of Aneurolepidium chinense community were measured by means of assimilation chamber under field condition, The results are as follows:1. It were measured 23 days after treatments, height of leaf layer of irrigation and irrigation add fertilizatiin were raised 8% and 9%; LAI of community were increased 68.97% and 99.93%; net photosynthesis per day were 2.48 and 3.76 times than contrast respectively; the biggest photosynthetic rate were 2.82 and 3.12 times than contrast respectively.2. After irrigation and fertilization, the type of diurnal change of photosynthetic rate of Aneurolepiium chinense community still were "double peak" curve. They were same with contrast. Only which of irrigation add fertilization (13 days after treatments) was "single peak" type, it hadn't a reduction at the noon time. Showing the type of diurnal change photosynthetic rate may was changed when the conition of water and ferility were better.3. When the temperature and relative humidity were worse or the treatment time was longer, the effects of treatment were apparent. At first measurement, the net photosynthesis per day of irrigation and irrigation add fertilization community were 1.26 and 1.17 times than contrast respecctively. At second measurement, they were 1.4 and 1.84 times respectively. At third measurement, they were 2.48 and 3.76 times respectively.