沙地樟子松人工林生长对非降雨季节土壤水分的影响

doi:: 10.13292/j.1000-4890.202101.015

摘要/Abstract

摘要： 以13、25～27、42、56年生沙地樟子松人工林为研究对象，以相邻草地为对照，在非降雨季节取样，测定0～10、10～20、20～40、40～60、60～80、80～100 cm土层土壤水分及其他土壤理化因子，分析不同年龄樟子松人工林非降雨季节土壤水分的变化规律。结果表明：沙地营建樟子松人工林后，幼龄林0～100 cm层土壤水分高于草地；中龄林、成熟林土壤含水量在土壤剖面逐层递减，但中龄林20～100 cm层低于草地，成熟林高于草地；过熟林土壤含水量随土层的变化呈“S”型曲线；随着林分年龄的增加，土壤水分在0～10 cm层与林龄无显著关系，10～20 cm层与林分林龄呈显著负线性关系，20～100 cm层随林龄的增加呈先下降后升高趋势，尤其是过熟林，土壤含水量高于中龄林、成熟林；土壤含水量在10～40 cm层与碱解氮呈极显著正相关，在40～60 cm和80～100 cm层与有效钾呈显著正相关；而0～10和60～80 cm层土壤含水量与其他理化因子无明显关系。

关键词: 沙地樟子松林, 林分生长, 非降雨季节, 土壤水分

Abstract: We measured soil moisture and other soil physicochemical factors in depths of 0-10, 10-20, 20-40, 40-60, 60-80, 80-100 cm in different aged (13, 25-27, 42, 56 a) Pinus sylvestris var.mongolica plantations and adjacent grasslands (as control) on sandy land in non-rainfall seasons. We further analyzed the variation patterns of soil moisture of different aged P. sylvestris var. mongolica plantations in non-rainfall season. The results showed that soil moisture in the 0-100 cm layer of young forest was higher than that of grassland. Soil moisture of middle-aged and mature forests decreased gradually across the soil profile. Soil moisture of middleaged forest in the 20-100 cm layer was lower than that of grassland, whereas soil moisture of mature forest was higher than that of grassland. Soil moisture in the over-mature forest showed an Sshaped curve in the soil profile. Soil moisture in the 0-10 cm layer did not change with the stand age, while that in the 10-20 cm layer was negatively correlated with stand age. The soil moisture in the 20-100 cm layer showed a trend of decreasing first and then increasing over stand age. Soil moisture in over-mature forest was higher than that of middle-aged and mature forests. The soil moisture was significantly positively correlated with the alkali hydrolyzable nitrogen in the 10-40 cm layer, significantly positively correlated with the available potassium in the 40-60 and 80-100 cm layers, but did not correlate with other physicochemical factors in the 0-10 and 60-80 cm layers.

Key words: Pinus sylvestris var. mongolica forest in sandy land, stand growth, non-rainfall season, soil moisture.

徐畅, 雷泽勇, 周凤艳, 毛禹. 沙地樟子松人工林生长对非降雨季节土壤水分的影响[J]. 生态学杂志, 2021, 40(1): 58-66.

XU Chang, LEI Ze-yong, ZHOU Feng-yan, MAO Yu. Effects of the growth of Pinus sylvestris var. mongolica plantation in sandy land on soil moisture in non-rainfall seasons.[J]. Chinese Journal of Ecology, 2021, 40(1): 58-66.

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沙地樟子松人工林生长对非降雨季节土壤水分的影响

Effects of the growth of Pinus sylvestris var. mongolica plantation in sandy land on soil moisture in non-rainfall seasons.

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