Clear cutting and regeneration of Robinia pseudoacacia by ditching with big plough

1. To prepare for the work, the big plough is to use a tractor to drive the big plough to plow the furrow in the felled land of Robinia pseudoacacia, which requires a tractor with high horsepower, and the big plough can use the iron plough used in ordinary farmland, but it requires the use of a single plough. Clean up the branches and big stones in the ground first.

two。 The selection of ploughing and trenching requires a concentrated connection of the land, with a slope of less than 25 degrees and a soil layer of more than 30 centimeters.

3. According to the technical requirements, the root distribution of Robinia pseudoacacia is shallow, the main root is not obvious, and the lateral root is well developed. the main lateral root is mostly distributed in the surface layer with soil thickness of 20 cm to 30 cm, and the main root is rarely as deep as 50 cm. The purpose of trenching is to cut off the lateral roots and form a large number of growing points to promote germination, so the ditching depth is 25cm to 30cm. Beyond this depth, it is easy to increase the resistance of the plough and cause damage, and if it is too shallow, it will not be able to cut off the lateral roots.

The ditching time is from late April to early May. The trenching direction is generally divided into two kinds, namely, the Hengshan direction and the shunshan direction. Robinia pseudoacacia planted in ridges before cutting can be ditched according to the original ridges, and those without ridges can be designed before ditching, Hengshan or Shunshan trees to open ditches. However, attention should be paid to leaving a partition when opening ditches along the mountain, that is, when the big plough is pulled out when walking for 20 to 30 meters, and accumulate a small mound in the pulled-out land, and then plough down after walking for 1 to 2 meters, which can effectively prevent soil erosion. The distance between the trenches is 2 meters, and the distance from the trenches to the cutting roots is 30-50 centimeters. The soil should be turned down the mountain.

As it is a mechanical operation, it is required that the cutting root in the woodland should not be too high and should be less than 5 cm, which should be thought of first when cutting. The logging of Robinia pseudoacacia should be carried out in the winter of the first year.

4. In the later stage, Robinia pseudoacacia germinated very quickly from the decapitation of lateral roots after ditching, so it was impossible to graze and carry out other human activities in the woodland. Plant setting and drying should be carried out from late July to early August, and the density is determined according to the needs.

We have been using this method for many years, and it is estimated that it costs 3035 yuan per mu. However, the conventional rooting afforestation of Robinia pseudoacacia costs 4555 yuan, which reduces the afforestation cost. In addition, ditching can also conserve water and fertilizer, and its young trees grow rapidly and close very quickly, which brings us remarkable benefits.