论文部分内容阅读
通过管栽模拟试验,研究了不同生态区8个芸芥类型(高抗旱类型的会宁芸芥、陇西芸芥,中抗旱类型的张北芸芥、Varomin芸芥、兴和芸芥、和田芸芥,低抗旱类型的西凉芸芥、四川芸芥)的根系生长情况。结果表明:芸芥根系生物量的垂直层次分布模型可用多项式y=a+bx+cx2+dx3描述;会宁、陇西、兴和、西凉芸芥与张北、和田、Varomin、四川芸芥的各参数值(a、b、c、d)总体相差较大且根系总生物量、各层次的生物量和根/冠比前者均低于后者;各层次根系生物量的百分含量也呈现不同的垂直变化规律。无论是总的还是各层次的根系生物量,强抗旱芸芥类型的趋于中等大小,中抗芸芥类型的有大也有小,低抗芸芥类型的均较大。
Through the tube-plant simulation experiment, we studied 8 species of Yunnan mustard in different ecotopes (Huining yunnane, Longxi yunai, middle-drought type Zhangbeiyun mustard, Varomin yunium, xinghe yunmei, Low drought-resistant type of Chinese cool mustard, Sichuan Yunzai) root growth. The results showed that the vertical distribution model of root biomass of Yunnan mustard can be described by the polynomial y = a + bx + cx2 + dx3; Huining, Longxi, Xinghe, Xizang Yunyi and Zhangbei, Wada, Varomin, The values of the parameters (a, b, c, d) varied widely and the total root biomass, biomass at different levels and root / crown ratio were lower than the former. The percentage of root biomass also showed Different vertical variation. Whether total or at all levels of root biomass, the type of strong drought-resistant jungle tends to medium-sized, medium-resistant jiezai types are large and small, low anti-jyuncle types are larger.