不同磷效率水稻品种在不同酸度土壤上生态适应性鉴定

Identification on Ecological Adaptation of Different P Efficiency Rice in Soils under Different Acidic Soils

为了解不同磷效率水稻品种在不同酸度土壤上的生态适应性情况,以中性土壤上筛选获得的45份耐低磷水稻品种和5份低磷敏感水稻品种作为供试材料,采用中性土壤为对照,在酸性和碱性土壤上进行了水稻苗期生态适应性鉴定,结果表明,3种土壤相对分蘖数均值表现为中性土>酸性土>碱性土,相对株高均值表现却相反,分别为碱性土>酸性土>中性土,但不同土壤变化不大;部分中性土壤上筛选的耐低磷水稻品种存在对不同酸度土壤的生态适应性差异。可见,不同水稻品种在不同酸度土壤上表现出对低磷的耐受能力不同,存在着耐低磷特性对不同酸度土壤的基因型差异。

The identification on ecological adaptation of seeding rice with different P-efficiency on acid and alkaline soil compared with neutral soil was studied using 45 low-P tolerant rice genotypes and 5 low-P sensitive rice genotypes screened on neutral soil. The results indicated that the relative tiller mean on three soils was alkali soil〉acid soil〉neutral soil. On the contrast, the relative height mean on three soils was neutral soil〉acid soil〉alkali soil〉part of low-P sensitive rice genotypes screened on neutral soil had differences of the ecological adaptation on different acidic soils. These results indicated that the low P tolerant capability of different rice genotypes in soils under different acidity was different, and it had genotypic differences with the characteristic of low P tolerant of different rice genotypes in soils under different acidity.