Effects of belt-spacing of artificial Caragana intermedia stands on the ecology of woodland on the Desert Steppe

doi:10.11686/cyxb2016387

Abstract

Abstract: The spacing of Caragana intermedia belts in plantations can markedly affect the ecology of the surrounding woodland. In this study, we evaluated the changes in the woodland habitat after cutting C. intermedia forests with different spacings of C. intermedia belts. The study site was a forest grassland on the desert steppe with C. intermedia belts planted with 4 m, 6 m, and 8 m spacings. The soil physical and chemical properties, air temperature, wind speed, and amount of wind erosion were evaluated to determine the effects of different belt spacings of C. intermedia forest after stumping (cutting) C. intermedia plants to a stubble height of 0 cm in April 2015. The main findings were as follows: 1) The forest grassland with 8 m spacing of C. intermedia belts showed the highest proportion of perennial herbaceous species, vegetation coverage, and vegetation density (P<0.05), but vegetation coverage did not differ significantly between the 4 m and 6 m C. intermedia belt-spacing treatments. There was no difference in aboveground biomass and species diversity among the three treatments (P>0.05). 2) As the belt spacing increased, the soil fine particle content, soil organic matter content, total nitrogen content, available phosphorus content, and available potassium content tended to increase. The soil water content was highest in the forest with 6 m belt spacing, and lowest in the forest with 4 m belt spacing. 3) The average air temperature was highest in the forest with 4 m belt spacing, and lowest in the forest with 8 m belt spacing, while wind speed showed the opposite trend. Wind erosion of soil was highest in the forest with 6 m belt spacing (P<0.05), and lowest in the forests with 4 m and 8 m belt spacings. 4) Correlation analyses indicated that plant diversity was positively correlated with soil organic matter content, soil total nitrogen content, and soil fine particle content, and that soil organic matter content was positively correlated with soil fine particle content and vegetation coverage. These results indicate that C. intermedia forests with 8 m belt spacing have the advantages of increased vegetation diversity, better soil quality, and lower soil wind erosion of the surrounding forest grassland.

CLC Number:

ma_hb@nxu.edu.cn

ZHOU Jing-Jing, MA Hong-Bin, ZHOU Yao, CAI Yu-Rong, WU Xing-Wang, SU Ting-Ting, JIA Xi-Yang. Effects of belt-spacing of artificial Caragana intermedia stands on the ecology of woodland on the Desert Steppe[J]. Acta Prataculturae Sinica, 2017, 26(5): 40-50.

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