| Effects of application of granular straw with different ingredients on available plant nutrients in soil and wheat growth |
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| DOI：10.7606/j.issn.1000-7601.2020.06.12 |
| Key Words: straw granule sulfur powder biochar wheat soil nutrient |
| Author Name | Affiliation | | FAN Ting | Key Laboratory of Plant Nutrition and the Agri\|Environment in Northwest China, Ministry of Agriculture, College of Resources and Environment, Northwest A＆F University, Yangling, Shaanxi 712100, China | | LIU Na | Key Laboratory of Plant Nutrition and the Agri\|Environment in Northwest China, Ministry of Agriculture, College of Resources and Environment, Northwest A＆F University, Yangling, Shaanxi 712100, China | | ZHANG Xia | Key Laboratory of Plant Nutrition and the Agri\|Environment in Northwest China, Ministry of Agriculture, College of Resources and Environment, Northwest A＆F University, Yangling, Shaanxi 712100, China | | ZHANG Yulin | Key Laboratory of Plant Nutrition and the Agri\|Environment in Northwest China, Ministry of Agriculture, College of Resources and Environment, Northwest A＆F University, Yangling, Shaanxi 712100, China
Shaanxi Key Laboratory of Land Consolidation, Xi'an, Shaanxi 710075, China | | WANG Xudong | Key Laboratory of Plant Nutrition and the Agri\|Environment in Northwest China, Ministry of Agriculture, College of Resources and Environment, Northwest A＆F University, Yangling, Shaanxi 712100, China | | YU Jian | Beijing Xinhefeng Agrochemical Information Co., Ltd., Lanzhou, Gansu 730000, China |
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| Abstract: |
| In the northwest of China, as the temperature is low, the straw returning to the field is slow in decomposition rate, nutrient circulation, and nutrition utilization rate. The crop emergence is also affected by straw, so the straw returning rate is low. To solve the above problems, straw granules were made of wheat straw, combined with sulfur powder (as nutrient activator) and biochar (as nutrient adsorbent) as exogenous materials. The mass ratios of sulfur powder were 3% (WS3), 5% (WS5), and 10% (WS10); the mass ratios of biochar were 5% (WC5), 10% (WC10), 15% (WC15), straw granule (WK), chopped straw (W, W6), and no straw returning (CK) were used as control. A pot experiment was carried out to explore the effects of straw treatment granules on available crop nutrients in soil and wheat growth. The results showed that compared with crop straw, straw granules significantly improved the available nutrients in soil, the biomass of wheat and the total N, P, and K content of the plant, and the straw granules added with sulfur or biochar significantly improved the nutrient availability in soil. (1) WS3 treatment had the highest nitrate (NO3-N), which was 14.44% higher than W treatment did; WC5 treatment had the highest NH4-N content, which was 40.93% higher than W treatment; WS10 treatment had the highest available P content, which was 23.42% higher than W treatment; WC5 treatment had the highest available K content, which was 9.05% higher than W treatment (P<0.05). (2) WS5 treatment had the highest biomass, 29.61% higher than WK treatment; WS10 treatment had the highest total N content, 11.44% higher than WK treatment; WS10 treatment had the highest total P content, 21.82% higher than WK treatment; WC15 treatment had the highest total K content, 12.53% higher than WK treatment (P<0.05). To sum up, this study found that straw granules returning had great potential in the northwest of China to achieve straw returning and nutrient cycling, and maintain soil fertility. |
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