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以盆栽、田间试验和大田调查相结合的方法,研究了黄土、冲积土和盐碱土等对小麦根系生长的影响。结果表明:不同土壤内小麦根系深度变化很大。一般在0.8～2.1米之间,个别的深度达3.4米。黄土区根系最深,有夹沙层的冲积土根扎最浅。不同土壤条件下,小麦各生育时期根系增长量的差异均达到极显著水平,在壤土、黄土中,根系生长较快,根内可溶糖和全氮含量较高,而且后期糖类下降较缓慢。沙土与白腻土中根的生长一直较慢,特别是春季差距更大。盐碱土中根的生长是前期较慢,拔节以后生长加快。平原冲积土随着土层质地排列的不同,各层根含量有明显的相应变化。
The effects of loess, alluvial soil and saline-alkali soil on the root growth of wheat were studied by combining potted plants, field experiments and field surveys. The results showed that the root depth of wheat varied greatly in different soils. Generally between 0.8 to 2.1 meters, individual depth of 3.4 meters. The deepest root system in the loess area is the shallowest alluvial soil with sand layers. Under different soil conditions, the differences in root growth rate of wheat at all growth stages reached extremely significant levels. In loam and loess, the root system grew rapidly, the contents of soluble sugar and total nitrogen in root were higher, and the later period of sugar decreased more slowly . The growth of the roots in sand and white soil has been slow, especially in the spring. The growth of root in saline-alkali soil is slow in the early period, and the growth is accelerated after the jointing. Plain alluvial soil texture with different arrangement, the root content of each layer has a corresponding change.