Growth and formation of Scots pine stands in Eastern Polissia of Ukraine

Zhezhkun, Anatoly M.

doi:10.2478/ffp-2022-0010

Figures & Tables

Distribution of Scots pine trees ha−1 by diameter classes on PSP 2-Slb in a 20-year-old pine forest in fresh, relatively poor oak-pine forest type (DBHavg. = 11.3 cm, skewness = 0.832, kurtosis = −0.125)

Equation of approximation of growth trends of reference pine stands of fresh, relatively poor oak-pine forest type

Evaluation indicator	Approximation equation	Reliability of the approximation
Average H [m]	У = 10.556 ln(x) − 18.72	0.965
Average DBH [cm]	У = 12.945 ln(x) − 24.237	0.970
Number of stems [ha⁻¹]	У = 1260447x^−1.272	0.899
Basal area [m²·ha⁻¹]	У = 14.467 ln(x) − 23.063	0.952
Stock [m³·ha⁻¹]	У = 0.0002x³ − 0.0778x² + 12.72x − 78.68	0.964

Forestry and evaluation indicators of pine stands on permanent sample plots

No PSP	Species composition	Age [years]	Avg H [m]	Avg DBH [cm]	Density of stocking		Number [pcs ha⁻¹]		Stock [m³·ha⁻¹]
No PSP	Species composition	Age [years]	Avg H [m]	Avg DBH [cm]	abs. [m². ha⁻¹]	relative	total	pine	Stock [m³·ha⁻¹]
	Forest crops 8PiSy2QuRo	5	1.6	1.0	0.3	–	4,408	3680	1
6-Bat	Natural regener. 10PiSy	5	1.0	–	0.1	–	9,140	9140	1
3-Bat	6PiSy4BePe + QuRo, PoTr	9	2.9	2.7	4.4	0.59	6,979	5521	13
5-Bat	10PiSy + BePe, PoTr, QuRo	10	3.8	3.7	10.2	1.02	11,279	9000	28
4-Shst	8PiSy1QuRo1PiAb + BePe, QuRu, SaCa	15	10.0	9.0	15.1	0.90	5,680	1776	90
2-Slb	9PiSy1BePe + PoTr, SaCa	20	11.1	11.3	20.4	0.69	2,342	1773	126
1-Krp	10PiSy + BePe	20	8.0	9.0	10.8	0.48	2,647	1542	52
1-Uzr	10PiSy + RoPs, BePe, PoTr, QuRo, PyCo, SaCa	38	20.4	26.3	29.2	0.74	1,011	490	274
1-Slb	10PiSy	44	21.2	2.2	37.5	0.83	786	786	376
1-Khlm	9PiSy1QuRo + AcPl, BePe, PoTr, FrEx, CaBe	62	27.8	29.5	37.4	0.82	711	488	443
2-Vld	9PiSy1BePe + AcPl, QuRo, PiAb, MaSy, TiCo	80	30.8	38.2	48.7	1.08	773	353	625
18-Slb	10PiSy + QuRo, BePe, SaCa	101	28.4	32.7	38.2	0.78	422	316	534
2-Sb	I layer 10PiSy + BePe	103	32.0	41.5	46.0	0.92	341	335	645
2-Sb	II layer 10TiCo	103	16.8	14.6	16.5	0.48	983	–	139

Distribution of Scots pine trees by HCI

No PSP	Age [years]	Number of trees by HCI: in the numerator – trees, in the denominator – %
No PSP	Age [years]	I	II	III	IV	V	VI	total	average
6-Bat	5	72277.0 {{722} \over {77.0}}	12813.6 {{128} \over {13.6}}	525.6 {{52} \over {5.6}}	181.9 {{18} \over {1.9}}	30.3 {3 \over {0.3}}	151.6 {{15} \over {1.6}}	938100.0 {{938} \over {100.0}}	I.40
3-Bat	9	30957.1 {{309} \over {57.1}}	14426.6 {{144} \over {26.6}}	7213.3 {{72} \over {13.3}}	50.9 {5 \over {0.9}}	30.6 {3 \over {0.6}}	81.5 {8 \over {1.5}}	541100.0 {{541} \over {100.0}}	I.66
2-Slb	20	17346.0 {{173} \over {46.0}}	11430.3 {{114} \over {30.3}}	4913.0 {{49} \over {13.0}}	123.2 {{12} \over {3.2}}	133.5 {{13} \over {3.5}}	154.0 {{15} \over {4.0}}	376100.0 {{376} \over {100.0}}	II.00
1-Krp	20	62.5 {6 \over {2.5}}	9438.7 {{94} \over {38.7}}	9438.7 {{94} \over {38.7}}	2811.5 {{28} \over {11.5}}	114.5 {{11} \over {4.5}}	104.1 {{10} \over {4.1}}	243100.0 {{243} \over {100.0}}	II.89
1-Uzr	38	10455.6 {{104} \over {55.6}}	3217.1 {{32} \over {17.1}}	3016.0 {{30} \over {16.0}}	31.6 {3 \over {1.6}}	10.5 {1 \over {0.5}}	179.1 {{17} \over {9.1}}	187100.0 {{187} \over {100.0}}	II.02
1-Slb	44	8947.3 {{89} \over {47.3}}	6735.6 {{67} \over {35.6}}	126.4 {{12} \over {6.4}}	94.8 {9 \over {4.8}}	–	115.9 {{11} \over {5.9}}	188100.0 {{188} \over {100.0}}	I.92
1-Khlm	62	10047.6 {{100} \over {47.6}}	7636.2 {{76} \over {36.2}}	209.5 {{20} \over {9.5}}	21.0 {2 \over {1.0}}	–	125.7 {{12} \over {5.7}}	210100.0 {{210} \over {100.0}}	I.87
2-Vld	80	2513.2 {{25} \over {13.2}}	9248.4 {{92} \over {48.4}}	3618.9 {{36} \over {18.9}}	63.2 {6 \over {3.2}}	63.2 {6 \over {3.2}}	2513.2 {{25} \over {13.2}}	190100.0 {{190} \over {100.0}}	II.74
18-Slb	101	10562.5 {{105} \over {62.5}}	3621.7 {{36} \over {21.7}}	169.5 {{16} \over {9.5}}	10.6 {1 \over {0.6}}	21.2 {2 \over {1.2}}	84.8 {8 \over {4.8}}	168100.0 {{168} \over {100.0}}	1.53
2-Sb	103	7638.8 {{76} \over {38.8}}	7236.7 {{72} \over {36.7}}	136.7 {{13} \over {6.7}}	–	21.0 {2 \over {1.0}}	3316.8 {{33} \over {16.8}}	196100.0 {{196} \over {100.0}}	II.38

Growth rate of reference pine stands of fresh, relatively poor oak-pine forest type of Eastern Polissia

Age [years]	Avg H [m]	Avg DBH [cm]	Basal area [m²·ha⁻¹]	Number of stems [ha⁻¹]	Stock [m³·ha⁻¹]	Stock change [m³·ha⁻¹]
Age [years]	Avg H [m]	Avg DBH [cm]	Basal area [m²·ha⁻¹]	Number of stems [ha⁻¹]	Stock [m³·ha⁻¹]	average	current
10	5.6	5.6	10.2	6738	41	4.1	–
20	12.9	14.5	20.3	2790	146	7.3	10.5
30	17.2	19.8	26.1	1666	238	7.9	9.2
40	20.2	23.5	30.3	1155	318	7.9	8.0
50	22.6	26.4	33.5	870	388	7.8	7.0
60	24.5	28.8	36.2	690	448	7.4	6.0
70	26.1	30.8	38.4	567	499	7.1	5.1
80	27.5	32.5	40.3	478	543	6.8	4.4
90	28.8	34.0	42.0	412	582	6.5	3.9
100	29.9	35.4	43.6	360	615	6.1	3.3
110	30.9	36.6	44.9	319	645	5.9	3.0
120	31.8	37.7	46.2	286	673	5.6	2.8

Growth and formation of Scots pine stands in Eastern Polissia of Ukraine

Figures & Tables

Figure 1

Equation of approximation of growth trends of reference pine stands of fresh, relatively poor oak-pine forest type

Forestry and evaluation indicators of pine stands on permanent sample plots

Distribution of Scots pine trees by HCI

Growth rate of reference pine stands of fresh, relatively poor oak-pine forest type of Eastern Polissia

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