Cooperating with the Forestry Bureau in Keerqinzuoyihou Qi, Tongliao, MTP contributed to the ecological restoration of 2 sandy plots in 2016. The plot 2016-2 was flat with great irrigation condition. In 2018, the average height, basal diameter and other features have all increased in various degrees, especially those of poplars. The survival rate maintains basically the same as year 2017.The proportion of the poplars which reach 1.3m high has decreased, while the proportion of the elms of such height has increased. This implies that the relatively thin poplar seedlings have died and some well-grown seedlings survived. This explains the rising average values of all features. There have been carried out plenty of replanting for elms. Because the height of replanted seedlings is generally over 1.3m, the average values of height has thus increased.
The first around of planting is plot was compeleted in April 2016 with the density of 825 trees per hectare. Samplings planted were mostly two years old and the average height was over 1.5 meters. The forestry bureau is taking care of the maintenance and replanting. The soil condition was not as good as plot 2016-1, with more bare sand and up-and-downs. The forest bureau paved two meters by two meters straw grids to fix the sand in the most desertified area.
Generally speaking, the survived poplars and elms are in good condition and there is no obvious damage.The trend of differentiation and polarization is mainly reflected in regional differences. The growth of trees in bare sand areas is good, while those in other areas are relatively weak and the growth is not so good.