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在天山北麓呼图壁县的草甸盐土区域,进行了由农业、生物、化学及水利相结合的综合改良措施。改良试验结果表明:改良地速效Mn含量在1.59~4.90 mg/kg,分布特点是:前期0~15 cm>15~30 cm≥30~60 cm;中期0~15 cm≥15~30 cm>30~60 cm;后期为0~15 cm>15~30 cm>30~60 cm。草木樨结合施有机肥和石膏,有牧草植被生长时0~60 cm内速效Mn含量有小幅度减少,而无植被时速效Mn在15~30 cm,30~60 cm内明显增加。总量在767.51~914.42 mg/kg,分布特点是:0~15 cm>15~30 cm>30~60 cm。Mn总量微弱增加,增加率均小于15%。单种草木樨结合施有机肥促进总量Mn在0~30 cm内积累。
In the meadow salt area of Hutubi County in the northern part of Tianshan Mountains, comprehensive improvement measures were put in place which were combined with agriculture, biology, chemistry and water conservancy. The results of the improved experiment showed that the available Mn content in the improved area was 1.59 ~ 4.90 mg / kg, the distribution characteristics were: 0 ~ 15 cm> 15 ~ 30 cm≥30 ~ 60 cm in the early stage, 0 ~ 15 cm≥15 ~ 30 cm> ~ 60 cm in late stage; 0 ~ 15 cm in late stage> 15 ~ 30 cm> 30 ~ 60 cm. When combined with organic manure and gypsum, the content of available Mn in the range of 0 ~ 60 cm decreased with the growth of forage vegetation, while the available Mn increased obviously in the range of 15 ~ 30 cm and 30 ~ 60 cm without vegetation. The total amount is in the range of 767.51 ~ 914.42 mg / kg. The distribution characteristics are: 0 ~ 15 cm> 15 ~ 30 cm> 30 ~ 60 cm. The total amount of Mn slightly increased, the increase rate was less than 15%. The results showed that Mn combined with organic manure promoted the accumulation of Mn in 0 ~ 30 cm.