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为了探究东北地区水田土壤下层土与水稻根系生长及产量的关系,采用微区试验方法,研究白浆土、黑土、草甸土三种类型水田土壤下层土对水稻根系生长和产量的影响。研究结果表明:不同类型土壤间水稻根系分布密度差异显著,其中黑土>草甸土>白浆土,且有下层土处理>无下层土处理;水稻总根长、根系直径、根尖数在不同类型土壤间差异极显著,不同土壤间表现规律不一致,但各类土壤均为有下层土处理高于无下层土处理;水稻根系总体积、表面积、干重、根冠比、垂直根长各项指标均与水稻产量呈正相关性;比较不同类型土壤水稻产量为:黑土>白浆土>草甸土,下层土对水稻产量贡献率分别为:黑土32.97%、白浆土6.32%、草甸土10.59%。
In order to explore the relationship between root growth and yield of paddy soils in paddy fields in Northeast China, the effect of soil subsoil in paddy soil, black soil and meadow soil on the root growth and yield of rice was studied by using the micro-plot test method. The results showed that there were significant differences in root distribution density among different types of soils, among which, black soil> meadow soil> albic soil, with lower soil treatment> no lower soil treatment; total root length, root diameter and root tip number of rice were different The results showed that there was significant difference between the types of soils and the inconsistencies among different soils. However, the soil types of all kinds of soils were treated with lower soil than those without lower soil. The total root volume, surface area, dry weight, root / shoot ratio and vertical root length The indexes of rice yield were positively correlated with each other. The yield of paddy was 32.97% for black soil, 6.32% for white soil, and the content of meadow soil 10.59%.