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本文应用~(15)N示踪技术,在盆栽试验条件下,研究了新疆7种耕作土壤的供氮能力-A_N值,以及影响A_N值的某些因素。7种土壤A_N值的大小顺序为石河子潮土>水稻土>阿克苏潮土>灰钙土>灰漠土>棕钙土>灌淤土。土壤的A_N值与作物干物质产量、植株吸收总氮量、植株吸收土壤氮量以及土壤碱解氮含量有明显相关性(P<0.01)。供试作物种类对土壤A_N值有较大的影响,同一土壤上,种植甜菜所测得的A_N值明显高于种植其他作物测得的A_N值。
In this paper, the application of ~ (15) N tracer technique, pot experiments were conducted to study the nitrogen-supplying capacity of A-N in 7 farming soils in Xinjiang and some factors that affect the value of A_N. The order of soil A_N value of seven kinds of soil is that of Shihezi soil> paddy soil> Aksu soil> ash soil> gray desert soil> brown soil> irrigation silt soil. Soil A_N value was significantly correlated with crop dry matter yield, plant total nitrogen uptake, plant uptake of soil nitrogen and soil available nitrogen (P <0.01). The values of A_N of the tested crops had a significant impact on the soil A_N value. The A_N values of beet cultivation on the same soil were significantly higher than those of other crops.