SU1041069A1 - Method of producing preliminary forest crops - Google Patents

Description

Od with

The invention relates to forestry, in particular to methods of planting forest crops under a forest canopy.

There is a known method of creating pre-forest crops by planting seedlings under the canopy of the interchangeable plantation, growing them under the canopy of the plantation and, after cutting the latter, forming them as open solid crops. The disadvantages of this method are the low percentage of survival rate and the low growth in height of the seedlings.

The closest to the present invention is a method of creating forest crops, including cutting the branches of the crown near the stem of a tree in various variants before planting z.

The disadvantages of this method are the low percentage of rooting of seedlings and their low growth in height,

The purpose of the invention is to increase the percentage survival rate of seedlings and enhance their height growth.

This goal is achieved by the fact that according to the method of creating a pre-growing forest crops, pruning of the branches is carried out evenly throughout the crown, while removing the lateral shoots of the last year of growth, excluding the two upper whorls.

The proposed method allows to balance the flow of water into the plant and its consumption for transpiration and photosynthesis, and to bring the number of needles and roots to the optimum ratio, and also limits the growth of the side branches.

Example. Preliminary cultures are created under the canopy, for example, poplar plantation i, the taxation characteristics of the two hospitals of which are given in table. one.

Tahalitsa

Spruce saplings with a height of 1 m or more are used as planting material. Before digging spruce, lateral shoots of the last year of growth are cut evenly over the entire crown, excluding the two upper whorls. Then Pruning lateral shoots of the last year of growth, excluding the 2 upper Mutov 16.610.2 97.611.3 ki Without pruning the branches (contb 17.3 ± 0.3 99, Oil, 5 role)

ale is dug and planted under the canopy of poplar plantings by known methods.

 Data on the growth of preliminary: cultures of spruce are given in table. 2

Tables. A2 10.1 ± 0.3 8.1 8.3 99.5 1.1 90, + 6.7 ± 0.3

in I6.0i0.3 92.8 ± 1.8 7.1 ± 0.2

a .17.7 ± 0.1 102.1 ± 1.9 13.210.5

b 17.8 ± 0, i4 99.6i1.9 8.610.1

in I6,5jr0, 98.9 ± 2.2 9.3 ± 0.3

1.96.

Prevention

05 To determine the degree of possible influence of the ratio of the aerial part and the underground part, in particular of the needles of roots, at the hospital 2 the amount of phytomass of the experimental plants was determined. The highest survival rate for preliminary cultures of spruce {99.5 | 99, and) was observed in section a - the proposed method. Pruning of the shoots of the last year of growth from the branches and on the growth of spruce in height has a significant effect. Growth is a complex indicator, defining lateral shoots after a year of growth, excluding 2 .ftt topholes,

Continued table. 2

S

92.5

7.2 6.7 99.1

1, 87,

I.

90.0 DMM, both the viability of woody plants and the influence on their growth of many growth factors, the Criterion of the significance of differences (t) in all cases is greater than tabular (tfj), which indicates a significant increase in height increase by section a compared to with control and prototype. The average weight of the phytomass of a single plant, preliminary cultures (inpatient 2} is given in spruce in Table 3. Table t mV

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Therefore, pruning significantly increases the survival rate and the growth of young cultures in height. The growth of the lateral branches is suspended and the growth of the central shoot has sharply increased. Both at hospital 1 and at hospital 2 preliminary cultures were eaten in sections a increased their height increase by 33j7 and, respectively, 3.8, i.e. irrespective of the effect of different on the taxation characteristics of poplar plantations, the increase in spruce height on section a increased approximately equally () "Cutting of side branches / section c)

although a few and increased the growth of oil in height, but it is not significant.

The results of studies of phytomass {tab. H) showed that when digging

6

Continued table. 3

forest seedling roots are damaged by 20.8%, Consequently, the water exchange of plants is sharply disrupted. Pruning lateral shoots of the last year growth excluding the two upper whorls reduced the number of needles by 23.6 and as a result, reduced the transpiration of plants. At the same time, the necessary amount of needles for successful photosynthesis remained on shoots 2 years and older. The ratio of needles and roots before digging is 2.0 (tails control, roots damaged in section a - 1.97) Thus, cutting the lateral shoots of the last year allows achieving a close to normal balance of needles and roots, which allows increasing the survival rate of preliminary crops and the growth of trees in height by 33% or more.

Claims (1)

METHOD FOR CREATING PRELIMINARY FOREST CROPS; - mainly spruce, including pruning from seedlings and planting them under the canopy of a replaceable planting, characterized in that, in order to increase the percentage of survival of seedlings and enhance their growth ^- in height, pruning is carried out uniformly throughout the crown, with this removes the lateral shoots of the last year of growth, excluding the two upper whorls.