[1]BAI Lushun,FAN Maopan,WANG Zilin,et al.Relationship Between Root Characteristics and Aggregate stability in the Field With Maize and Soybean Intercropping[J].Research of Soil and Water Conservation,2019,26(01):124-129.
Copy
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 01
Page number:
124-129
Column:
Public date:
2019-02-28
- Title:
-
Relationship Between Root Characteristics and Aggregate stability in the Field With Maize and Soybean Intercropping
- Author(s):
-
BAI Lushun, FAN Maopan, WANG Zilin, WANG Ting, DENG Chao, LI Yongmei
-
College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China
-
- Keywords:
-
slope farmland; intercropping; root characteristics; aggregate stability; fractal dimension
- CLC:
-
S157.4+31
- DOI:
-
-
- Abstract:
-
The field experiment with three planting patterns, including maize monoculture, soybean monoculture, and maize and soybean intercropping, was carried out to study the effects of crop root on soil aggregate stability. Root density, root length, root surface area and other root characteristics in 0-10 cm, 10-20 cm and 20-30 cm soil layers were analyzed under different planting patterns by WINRHIZO. The stability of soil aggregates in each soil layer was analyzed by wet sieve method. The results showed that the root characteristic indexes of all three planting patterns decreased with the increase of soil depth; in 0-10 cm soil layer, the root density and root volume of intercropping were 14.79% and 11.74% higher than those of monocultures, respectively;mean weight diameter (MWD) and geometric diameter (GMD) in each soil layer were higher in intercropping pattern than those in monocultures, while percentage of aggregate destruction (PAD), soil erodibility (K), fractal dimension (D) werelower, especially in 0-10 cm, indicating that structure soil aggregates were more stale in intercropping pattern; the correlation analysis showed that PAD was significantly negatively correlated with root volume and root tip numbers, extremely significantly correlated with root length, root surface area, root length density, and root branch number. These results indicated that root length, root length density, root surface area and root branch number may improve soil aggregate stability. It is concluded that intercropping can significantly improve the root surface area, root length and so on, and thus improve the stability of soil aggregates.