[1]LU Mei,WANG Ting,FAN Maopan,et al.Effects of Intercropping on the Potato Roots and Soil Structure Stability in Slopping Land of Red Soil Region[J].Research of Soil and Water Conservation,2023,30(02):67-73.[doi:10.13869/j.cnki.rswc.2023.02.007]
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Effects of Intercropping on the Potato Roots and Soil Structure Stability in Slopping Land of Red Soil Region
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 02
Page number:
67-73
Column:
Public date:
2023-03-10
- Title:
- Effects of Intercropping on the Potato Roots and Soil Structure Stability in Slopping Land of Red Soil Region
- Keywords:
- slope farmland red soil; root morphological characteristics; root exudates; soil aggregate
- CLC:
- S157.4+31; S152.3
- DOI:
- 10.13869/j.cnki.rswc.2023.02.007
- Abstract:
- In order to reveal the effect of intercropping on potato roots and structural stability of red soil in sloping farmland, the randomized block design was used in the field experiment, two treatments of potato monoculture and maize-potato intercropping were set to determine the soil aggregate stability index, root morphological characteristics and exudate contents at different growth stages of potato, and the effects of root morphology and exudates of potato on soil aggregate stability under different planting patterns were analyzed. The result showed that:(1)under the same planting pattern, the root morphological characteristics of potato system except root average diameter increased first and then decreased with the growth period; in potato flowering and tuber bulking period, the total root length, total root surface area and total root volume of intercropping potato were higher than those of monoculture, and the total root length, total root surface area and total root volume of intercropping potato during tuber bulking increased by 24.41%, 24.75% and 35.03%(p<0.05), respectively, compared with those of monoculture;(2)the variation trend of total sugar and total organic acid content in root exudates of potato with the growth period was the same as that of morphological indexes, which increased first and then decreased; the contents of total sugar and total organic acid in root exudates of potato tuber bulking stage significantly increased by 37.85% and 34.64%(p<0.05)compared with those of monoculture;(3)soil aggregate stability index R0.25, MWD and GMD showed an increasing trend with the passage of growth period under the monoculture and intercropping planting mode(p>0.05), and D showed a significant downward trend(p<0.05). R0.25, MWD and GMD under intercropping mode were significantly higher than those under monoculture except for MWD at flowering period(p<0.05); D showed a decreasing trend, and intercropping was significantly lower than monoculture(p<0.05);(4)at flowering period and tuber bulking period, the total root length, total root surface area, total root volume, total sugar in exudates and total organic acid of potato roots were positively correlated with soil aggregate stability indexes R0.25, MWD and GMD, and negatively correlated with D; the correlation among most indexes at tuber bulking period reached the significant(p<0.05)or extremely significant(p<0.01)level; at maturity period, the correlation between potato root exudates and soil aggregate stability index was the same as those in the previous two periods, while the correlation between root morphological characteristics and soil aggregate stability index was opposite to those in the previous two periods. To sum up, the effect of intercropping potato on improving soil structure stability is better than monoculture potato.
- References:
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Last Update:
2023-03-10