| Effects of straw returning and earthworm activity on soil water transport under wheat\|maize rotation |
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| DOI：10.7606/j.issn.1000-7601.2024.02.17 |
| Key Words: soil water transport wheat\|corn rotation straw returning to field earthworm activity |
| Author Name | Affiliation | | HUO Rongrong | Baoji University of Arts and Sciences, Key Laboratory of Disaster Monitoring and Mechanism Simulation of Shaanxi Province, Baoji, Shaanxi 721013, China | | MA Li | Baoji University of Arts and Sciences, Key Laboratory of Disaster Monitoring and Mechanism Simulation of Shaanxi Province, Baoji, Shaanxi 721013, China | | XIONG Lijun | Baoji University of Arts and Sciences, Key Laboratory of Disaster Monitoring and Mechanism Simulation of Shaanxi Province, Baoji, Shaanxi 721013, China |
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| Abstract: |
| To explore the cultivation techniques of wheat and maize water efficient utilization in Guanzhong Plain, the method of spot observation in the field was used to study the effect of straw returning and earthworn inoculation on soil water content. The treatments included CK (control), S1 (straw returned to the field 3 000 kg·hm-2), S2 (straw returned to the field 6 000 kg·hm-2), E (inoculated earthworms), S1E (straw returned to the field 3 000 kg·hm-2+ inoculated earthworms), S2E (straw returned to the field 6 000 kg·hm-2+ inoculated earthworms). The results showed that: compared with CK, the soil water contents under S1, S2, E, S1E and S2E treatments increased by 0.21%~27.47%, 0.43%~32.85%, 1.00%~15.53%, 3.25%~36.52% and 2.97%~51.24%, respectively. The soil water contents under CK, S1, S2, E, S1E, and S2E treatments were 15.51%, 17.14%, 17.66%, 16.33%, 17.94% and 18.91%, respectively. S2E treatment had the best water retention effect, followed by S2 and S1 treatment, and E treatment had the least obvious effect. From wheat flowering stage and harvest stage to maize despot stage and harvest stage, soil moisture content of 0~100 cm showed an overall increasing trend under different treatments, with the maximum mean value was 20.60% at maize harvest stage and the minimum mean value was 8.63% at maize despot stage. Compared with CK, other treatments expanded the range of high water cut areas, and the range of high water cut areas in soil treated with earthworms was larger than that without earthworms. The correlation analysis of factors affecting soil water content in wheat\|maize growing period showed that soil water content was significantly positively correlated with large aggregates >0.25 mm, SOC content and TN content (P<0.05). It was significantly negatively correlated with soil aggregates, pH and capillary pores of 0.053~0.25 mm and <0.053 mm (P<0.05). In conclusion, the joint action of straw returning to field and earthworm activity increased soil water content and expands deep high water cut area. |
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