ZHENG Wenkui, LU Yongjian, DENG Xiaoyang, et al. Effects of Controlled-release Nitrogen Fertilizer on Decomposition of Maize Straw and Organic Carbon Fractions in Fluvo-aquic Soil[J]. 2020, 34(5): 292-298.
DOI:
ZHENG Wenkui, LU Yongjian, DENG Xiaoyang, et al. Effects of Controlled-release Nitrogen Fertilizer on Decomposition of Maize Straw and Organic Carbon Fractions in Fluvo-aquic Soil[J]. 2020, 34(5): 292-298. DOI: 10.13870/j.cnki.stbcxb.2020.05.040.
Effects of Controlled-release Nitrogen Fertilizer on Decomposition of Maize Straw and Organic Carbon Fractions in Fluvo-aquic Soil
Fertilization affects the effect of straw returning to the field. To study the effects of different forms of nitrogen fertilizer on the decomposition of straw and the soil organic carbon fractions can provide scientific basis for the rational application of nitrogen fertilizer under straw returning. Based on the 10-year experiment of wheat-maize rotation and location fertilization
the effects of different amounts of controlled-release urea mixed and common urea(CRF)and common urea (CF) (120
240 and 360 kg N/hm2) on the decomposition of maize straw and soil organic carbon fractions in fluvo-aquic soil were studied. The results showed that compared with the CF treatment
the CRF treatment had a tendency of promoting the decomposition of straw. At the late stage of straw decomposition
CRF treatment significantly promoted the release of nitrogen and phosphorus from straw compared with CF treatment
while different nitrogen fertilizer treatments had no significant effect on the release of potassium from straw. At the later stage of straw decomposition
under the same nitrogen application rates
CRF treatment with conventional nitrogen application and increased nitrogen application significantly increased the content of water-soluble and heat-soluble organic carbon in soil. In terms of increasing soil microbial biomass carbon and nitrogen contents
the promotion of CRF treatment was significantly higher than that of CF treatment at some stages of straw decomposition. In general
compared with CF treatment
CRF treatment has a better effect on promoting straw decomposition and increasing soil organic carbon fractions.
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references
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