| Cite this article: | 张曼玉,李小伟,杨磊,等.不同施磷方式对滴灌棉田土壤磷动态及无机磷组分的影响[J].灌溉排水学报,0,():-. |
| ZHANG Man-Yu,LI Xiao-Wei,YANG Lei,et al.不同施磷方式对滴灌棉田土壤磷动态及无机磷组分的影响[J].灌溉排水学报,0,():-. |
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| Effects of Different Phosphorus Application Methods on Soil Phosphorus Dynamics and Inorganic Phosphorus Components In Drip Irrigation Cotton Field |
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ZHANG Man-Yu1, LI Xiao-Wei2, YANG Lei1, YANG Hai-Chang1, ZHANG Feng-Hua1, MA Wen-Xin2, FAN Ji-Hui1
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1.Shihezi University;2.Xinjiang Huier Agricultural Group Co,Ltd,Changji
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| Abstract: |
| Abstract: 【Background】Xinjiang is located in the arid and semi-arid regions, the soil is calcareous, long-term application of phosphorus fertilizer causes phosphorus enrichment in the soil, phosphorus is easy to combine with calcium and iron ions in the soil, forming insoluble compounds, affecting the phosphorus fertilizer utilization efficiency and soil phosphorus balance. Since 1997, Xinjiang has promoted drip irrigation technology on a large scale, which saves water and at the same time can deliver fertilizer directly to the vicinity of crop roots through drip application with water, improving the efficiency of fertilizer utilization.【Objective】Due to the poor mobility of phosphorus in soil, the phosphorus fertilizer application method can be optimized to effectively change soil phosphorus status, soil inorganic phosphorus fraction and crop yield, thus improving phosphorus fertilizer utilization efficiency.【Methods】In this study, a two-year field trial was conducted in 2019―2020 in Changji, Xinjiang. Four treatments were set up, namely DF1: basal application of all base fertilizers (additional fertilizer were mainly amino acid water-soluble fertilizers); DF2: basal application of all base fertilizers (additional fertilizers were mainly microbial compound fertilizers); NF1: additional application of all base fertilizers (additional fertilizers were mainly amino acid water-soluble fertilizers); NF2: additional application of all base fertilizers (additional fertilizers were mainly The fertilizer application method of all base fertilizer and the fertilizer application method of all additional fertilizer were used as controls for each other, and the same amount of fertilizer was applied to each treatment in 2019 and 2020, both of which were converted according to the nutrient requirements of cotton. Soil samples were collected at the bud, boll, spat and harvest stages of cotton, and soil effective phosphorus, microbial phosphorus, inorganic phosphorus fractions and cotton yield were determined.【Results】In this study, we found that NF1 and NF2 treatments significantly increased the effective phosphorus and microbial phosphorus in the 0～20 cm soil layer during the boll, lint and harvest stages of cotton compared with DF1 and DF2 treatments. The inorganic phosphorus fractions in the 0～20 cm soil layer of NF1 and NF2 treatments were determined and found that Ca2-P was highest in both NF1 and NF2 treatments at the boll stage, Ca10-P and AL-P were lowest at the boll stage, and Ca8-P increased from bud to lint stage but decreased at the harvest stage. Correlation analysis showed that soil effective phosphorus was significantly positively correlated with Ca2-P and negatively correlated with Ca10-P and AL-P. Fertilizer application with all base applications significantly increased the amount of direct phosphorus sources in the soil and reduced the conversion to slow-acting phosphorus sources, thus increasing the effectiveness of phosphorus in the soil. Compared with the basal application of all the base fertilizer, the additional application of all the base fertilizer increased cotton yield by 7.5% on average.【Conclusion】In summary, by reducing the amount of base fertilizer applied and applying phosphorus fertilizer accurately and quantitatively according to the crop fertilizer requirement rules can increase the effective soil phosphorus, reduce the conversion of soil phosphorus to ineffective phosphorus sources and increase crop yield. This study provides a theoretical basis for the rational application of phosphorus fertilizer in cotton production in arid zones. |
| Key words: fertilization method; available P; P classification ; phosphorus accumulation ; dripping?irrigation |
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