Abstract:
According to the distribution of agrotype,soil nutrient content and forage grass level of the farming-grazing ecotone in North Shaanxi, the suitability of soil nutrient content for the grass growing of this area was evaluated. Results show that:the soil nutrient content is low in this area,the contents of available N and P are mainly concentrated on 6—8 level,the area ratios are 92.1% and 99.21%,the content of available K is mainly concentrated on 4—6 level,the area ratio is 90.62%;the forage yield level is low,and mainly concentrated on 5 and 6 level, the area ratio is about 92.24%;from the soil nutrient hierarchies, high level of soil is accounted for only 7.86%, mainly concentrated in the south area along the Great Wall where vegetation is relatively good ,at the same time, these areas have higher herbage yield. It should take measures according to the distribution of soil nutrient content.
