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Effects of different organic residues on rice yield and soil quality |
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| Authors: | Li Peng Wei Liu Chunjiang Su Ping Li Yan Fang Xiaolan Wang Lian Sun |
| Institution: | 1. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, No. 9. Section 4, South Renmin Road, Beijing, China 2. Graduate University of Chinese Academy of Sciences, Beijing, 100049, China 3. Institute of Horticulture, Sichuan Academy of Agricultural Sciences, Chengdu, 610066, China 4. Key Laboratory of Horticultural Crops Biology and Germplasm Enhancement in Southwest Regions, Ministry of Agriculture, Chengdu, 610066, China 5. Southwest Jiaotong University, Chengdu, 610031, China 6. Sichuan Technology and Business Collage, Dujiangyan, 611844, China 7. Sichuan Provincial Environmental Information Center, Chengdu, 610015, China |
| Abstract: | Calcaric regosols are a valuable land resource, distributed widely across western China. Soil quality has deteriorated considerably in recent years owing to the blind pursuit of economic benefits. A 2-year field experiment was carried out to evaluate the effects of using spent mushroom compost, leguminous plant (Vicia sepium L.) compost, and a combination of the two (at a 1:1 and 2:1 ratio), on rice yield and soil quality in a suburb of China. Vicia sepium L. composted with spent mushroom compost at a 1:1 ratio produced the highest grain and stover yield, grain and stover phosphorus concentration, and phosphorus uptake of rice; they were 56.5%, 93.2%, 89.3%, 198.6% and 22.2% greater than control soil, respectively. The 2:1 ratio (Vicia sepium L.: spent mushroom compost) produced the highest grain N concentration, stover N concentration, and N uptake; they were 31.6%, 31.4%, and 40.7% higher than control, respectively. Soil physical, chemical, and environmental properties were improved with the application of Vicia sepium L. composted with spent mushroom compost at a 2:1 ratio. In particular, soil water-stable aggregates, organic carbon, particulate organic carbon, total nitrogen, available potassium, and cation exchange capacity increased, whereas bulk density, pH, and phytoavailable heavy metals decreased. This organic treatment is beneficial to improve soil quality indicators, and contribute to soil restoration. |
| Keywords: | Co-composting Leguminous plants Soil quality indicators Soil restoration Spent mushroom compost |
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