鲁中南地区不同经济林种植模式的改良土壤效应.

[Objective] The aims of this study are to explore the effects of different economic forest planting modes on soil water physical properties and soil nutrients in central and southern Shandong, and to provide a basis for screening and planting management of soil and water conservation economic forest planting modes in this area. [Methods] Four kinds of economic forest planting modes in Menglianggu small watershed of Mengyin County, Linyi City, were selected as the research objects, including A. persica (TS). C. pinnati fida (SZ). M. pumila P. pseudocerasus (PY). and C. mollissima + 2. bungeunum (BH), with wasteland (CK) as the control. The water physical indexes such as soil bulk density, porosity and water storage capacity, and the nutrient indexes such as soil organic carbon, total nitrogen, total phosphorus and available nutrients were measured and analyzed. The soil improvement effect was comprehensively evaluated hy Principal component analysis and fuzzy mathematics membership function method. [Results] (1) Economic forest planting could improve soil porosity and water storage performance. Compared with CK, the four economic forest. planting patterns could reduce soil bulk density by 7.3%~22.1%, increase capillary porosity by 14.2%~ 42.0%, and increase soil maximum water storage by 16.5%~43.8%. The soil water holding capacity decressed in the order, TS>PY BH>SZ>CK. In addition to PY. other economic forest planting patterns could effectively increase soil storage and storage precipitation, showing BH TS SZ>CK. The effect of economic forest planting on the storage precipitation and effective storage capacity of 0-20 cm soil layer was more obvious. Compared with 0-20 cm soil layer the porosity and maximum water storage capacity of 20 40 cm soil layer decreased, and the change range of TS was the smallest. (2) Economic forest planting could improve soil organic carbon and available nutrients. Compared with CK the four economic forest planting patterns could increase soil organic carbon by 6.9%~270.4%, which was expressed as TS>PY BHSZ CK: the contents of total nitrogen and total phosphorus in soil decreased in the oder, TSPY>BH>SZ> CK. The effect of economic forest planting on the nutrient content of 0-20 cm soil layer was more obvious. Compared with 0-20 cm soil layer the nutrient content of 2040 cm soil layer decreased. (3) The indicators reflecting the soil improvement effect of economic forest planting modes could be summarized into three categories. The first was soil capillary water holding characteristics and nutrient characteristics, the second was soil water storage characteristics and the third was soil non-capillary water holding. characteristics. [Conclusion] The cotoprehensive evaluation of soil improvement effect of different economic forest planting modes is, A. persica C. mollissima Z. bungeanum M. pumila + P. pseudocerasus>С. pinnatifida wasteland. Compared with grassland economic forest planting can significantly improve the physical properties of soil moisture and improve soil nutrient performance, but the soil improvement effect varies greatly with different planting modes. In the arid and barren mountainous areas of central and southern Shandong, the planting mode of A. persica has the best effect on soil improvement, followed by C. mollissimaZ. bungeunum and C. pinnatifidu is relatively poor. [ABSTRACT FROM AUTHOR]