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本文对中国北方18种不同类型的作物及2种农田杂草的根系生长深度、生物量与地上部的关系进行了两年观察,所有18种作物及2种杂草根深分布在40～300cm之内,根系最浅的为芝麻,最深的为大麻.一般高秆作物根系相对较深,但矮秆作物也有根深者,如甜菜、花生、小麦等;一般生育期短、耐瘠抗旱喜欢冷凉的作物根系分布较浅.根系深浅与作物类型无关,不论各类、纤维类、豆类、甚至块根块茎类都有深浅之差.所有18种作物株高根深的根冠比平均为2.27,生物量的冠根比平均为7.25;根系垂直分布呈指数递减模式y=A.e~(bx),但不同作物b值不同.二种杂草不论根深及生物量都较大.
In this paper, we observed the depth of root growth, the relationship between biomass and shoots in 18 different types of crops and 2 kinds of farmland weeds in northern China for two years. The distributions of all 18 kinds of crops and 2 kinds of weeds were deep in 40 ~ 300cm Within the root system, the shallowest is sesame, the deepest is cannabis.Generally, tall stalks have relatively deep roots, but dwarf stalks also have deep roots, such as beet, peanut, wheat, etc .. The general growth period is short, resistance to drought and drought like cold Root system shallow depth and crop type has nothing to do, regardless of all kinds, fiber, beans, and even tuberous tuberous species have shades of depth.All 18 kinds of plant height deep root-shoot ratio average 2.27, biological The root-mean-square ratio was 7.25, while the vertical distribution of roots was exponential decreasing mode y = Ae ~ (bx), but the b value of different crops was different.