EFFECT OF THINNING ON GROWTH AND VIGORITY OF HALOXYLON SPP. PLANTATION IN GONABAD

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FEREYDOUNI NASRI M.; RAHBAR E.

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Journal: IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH Year:2004 | Volume:11 | Issue:1 Page(s): 19-31

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Title

EFFECT OF THINNING ON GROWTH AND VIGORITY OF HALOXYLON SPP. PLANTATION IN GONABAD

Author(s)

FEREYDOUNI NASRI M. | RAHBAR E. | Issue Writer Certificate

Keywords

HALOXYLONQ2

SAXAULQ3

THINNINGQ3

SOIL TEXTUREQ4

RAINFALLQ4

GONABADQ3

Abstract

A general model was developed in 1988 to explain the interrelationships between soil saturation percentage, mean annual precipitation, and population density on growth and vigority of HALOXYLON plantation. The main recommendation of this model is THINNING wilted stands in accordance with the above noted factors. Calibrating this general modal for optimizing the population desity of wilted HALOXYLON plantation for GONABAD condition is the main objective of the present study. Based on the general model, estimated number of population densirty for experimental site in GONABAD was 150 trees per hectar; therefore, six density treatment (Ti) were selected in a 10 years old wilted stand as following: T1= 150 - (150×20%)= 120 T2= 150 - (150×10%)= 135T3= 150 (estimated number based on the model)T4= 150 + (150×10%)= 165 T5= 150 + (150×20%)= 180 T6= 250 (existing density as the control) In 1995, excess trees in a Randomized Complet Block Desing with four replication were removed. The height (H) and crown diameters (CD) of the remained trees were measured at the time and repeated in end of next growing seasons. On the basis of collected data, a size index (SI) model was developed by using H×(CD)2 formula. Results showed that five years after treatment, there was no significant difference between growth percentage of H, CD, and SI in this short period. The highest growth of SI belongs to T1 and the lowest to T6 (control). Also, results showed that increasing of SI in T1 was twice bigger than T6.

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APA: Copy

FEREYDOUNI NASRI, M., & RAHBAR, E.. (2004). EFFECT OF THINNING ON GROWTH AND VIGORITY OF HALOXYLON SPP. PLANTATION IN GONABAD. IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH, 11(1), 19-31. SID. https://sid.ir/paper/107403/en

Vancouver: Copy

FEREYDOUNI NASRI M., RAHBAR E.. EFFECT OF THINNING ON GROWTH AND VIGORITY OF HALOXYLON SPP. PLANTATION IN GONABAD. IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH[Internet]. 2004;11(1):19-31. Available from: https://sid.ir/paper/107403/en

IEEE: Copy

M. FEREYDOUNI NASRI, and E. RAHBAR, “EFFECT OF THINNING ON GROWTH AND VIGORITY OF HALOXYLON SPP. PLANTATION IN GONABAD,” IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH, vol. 11, no. 1, pp. 19–31, 2004, [Online]. Available: https://sid.ir/paper/107403/en

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