Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (15): 55-62.doi: 10.11924/j.issn.1000-6850.casb2020-0408

Special Issue: 资源与环境 耕地保护

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Soil Improvement Effect of Five Different Typical Forests in Saline-alkali Soil in Western Jilin Province

Wang Zimo(), Lin Shijie, Zhang Dawei, He Huaijiang, Chen Siyu, Bao Guangdao, Jia Qingbin, Zhang Zhonghui()   

  1. Jilin Provincial Academy of Forestry Sciences, Changchun 130033
  • Received:2020-08-26 Revised:2020-10-26 Online:2021-05-25 Published:2021-05-18
  • Contact: Zhang Zhonghui E-mail:wzm100214@163.com;zzhgiszzh@163.com

Abstract:

To reveal the soil improvement effect of different forest types in saline land of western Jilin Province, five types of typical forests distributed in Qian’an County, Songyuan City were selected as research objects, which were Tamarix chinensis forest, Populus × xiaohei forest, Pinus tabuliformis forest, Populus × xiaohei and Ulmus pumila mixed forest and Lycium chinense forest, respectively. Took the unplanted land as control, the physicochemical properties of soil in 0-30 cm were studied by the method of soil sampling and laboratory measurement. The results showed that: compared with the unplanted land, the physical and chemical properties of soil of the 5 kinds of forests were all improved to a certain extent. The soil bulk density decreased while the soil porosity increased. Soil infiltration capacity in different forest types was improved. The pH significantly decreased by 3.69% to 7.50% compared with the unplanted land in 0-10 cm soil layer. Soil nutrient content of forestland was significantly increased compared with the unplanted land. Soil organic matter, total nitrogen, available nitrogen, total phosphorous, available phosphorous, total potassium and available potassium content of forestland were higher than that of the unplanted land in every soil layer. Soil nutrient content mainly concentrated in 0-20 cm, showing obvious surface accumulation. Using principal component analysis to evaluate the 14 soil quality indicators, the comprehensive score of the 5 types of forests were listed in the sequence of Lycium chinense forest (43.81) > Tamarix chinensis forest (40.79) > Populus ×xiaohei and Ulmus pumila mixed forest (40.33) > Populus ×xiaohei forest (39.31) > Pinus tabuliformis forest (39.03) > CK (33.55). The five types of typical forests could improve soil physiochemical properties. Lycium chinense and Tamarix chinensis could be considered as the optimized tree species in the process of saline land improvement by restoring vegetation in western Jilin Province.

Key words: forest types, soil improvement, physicochemical properties, principal component analysis, western Jilin Province, saline land

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