摘要
采用开顶式熏气装置对水稻(品种:6536)进行了急性和慢性伤害的氟化氢熏气。结果表明:引起水稻叶片5％叶面积伤害的大气HF浓度与熏气时间呈线性关系,其回归方程为:1ny=5.42-0.72lnx(r=-0.9929,P<0.001),因而得出HF对水稻伤害的阈值曲线。根据剂量—积累公式得出HF熏气后的积累系数K=2.63。当大气HF作用剂量大于伤害阈值时,水稻产量将受到不同程度的影响。
Rice ( Var: 6536) Was exposed to acute and chronic dose of hydrogen fluoride ( HF ) in open-top field chambers. The results indicate that there is a linear inter relationship between the fumigation period and the concentration of HF causing injury to 5 % of the rice foliage. Its regressive equation is InY = 5.42- 0.72 In× (r= - 0.9929, p<0.001). So, we can get its threshold curve. According to the dose-accumulation formula, the accumulation coefficient (K) is 2.63 after HF fumigation. The yield of rice will be affected at different degrees when the dose of HF is beyond its injury thresholds.
出处
《环境科学研究》
EI
CAS
CSCD
1990年第1期33-37,共5页
Research of Environmental Sciences
