Data Collection
figure 5. the treatments of the R. pseudoacacia seedling
Seeds of R. pseudoacacia were collected on a hill 2 km away from the research station in March 2007 in a stand of R. pseudoacacia. The experiment was carried out during July and August
2007. The seedlings grown for 4 months were submitted to water and shade stress (ten plants per stress type).
All of the pots were divided into four groups:
(1) Well-watered and Sunlight;
(2) Well-watered and Shade;
(3)Drought and Sunlight
(4) Drought and Shade;
2007. The seedlings grown for 4 months were submitted to water and shade stress (ten plants per stress type).
All of the pots were divided into four groups:
(1) Well-watered and Sunlight;
(2) Well-watered and Shade;
(3)Drought and Sunlight
(4) Drought and Shade;
figure 6. the shade shelter 5.0x2.5x3.0(length x width x height)
The shade -stress treatment was conducted in shade shelters covered by woven black nylon nets.
Drought groups: the soil moisture reached 30%-40% of the field capacity(FC)
Well-watered groups: the soil water content between 70 and 80% of the FC.
Drought groups: the soil moisture reached 30%-40% of the field capacity(FC)
Well-watered groups: the soil water content between 70 and 80% of the FC.
Data Tables
Forty mature leaves from eight petioles of each treatment were taken to determine leaf incliation. The midrib angle and petiole angle were measured with a vertical clinometer. The leaf azimuth
was measured with a magnetic compass
was measured with a magnetic compass
table 1. Changes of midrib angle and petiole angle of R. pseudoacacia under all treatments during the whole period.
