عرض بسيط للتسجيلة

المؤلفMa, Zhanxia
المؤلفWu, Weixiong
المؤلفAlatalo, Juha M.
المؤلفFu, Wuxiang
المؤلفBai, Yang
تاريخ الإتاحة2021-11-18T11:28:08Z
تاريخ النشر2021-10-15
اسم المنشورWater
المعرّفhttp://dx.doi.org/10.3390/w13202895
الاقتباسMa, Z.; Wu, W.; Alatalo, J.M.; Fu, W.; Bai, Y. Optimal Water-Fertilizer Combinations for Efficient Nitrogen Fixation by Sugarcane at Different Stages of Growth. Water 2021, 13, 2895. https://doi.org/10.3390/w13202895
المعرّف2895
معرّف المصادر الموحدhttp://hdl.handle.net/10576/25008
الملخصHigh fertilizer application and over-irrigation in sugarcane systems can cause considerable N2O emissions. Optimized water-fertilization management which reduces N2O emissions, while maintaining sugarcane biomass, is crucial, but may affect nitrogen fixation by sugarcane. This study evaluated the combined effect of water-fertilization on sugarcane biomass and nitrogen fixation in field trials in southern China. Treatments included drip and spray irrigation, with three levels (0% (low), 50% (medium), 100% (high)) of irrigation and of fertilizer. A rain-fed crop (no irrigation or fertilizer) was included as the control. The results showed that (1) spray irrigation with medium water and high fertilization increased biomass. The optimum combination in sugarcane elongation stage was drip irrigation with medium water and high fertilization, while drip irrigation with high water and high fertilization was the best choice for maturity stage. (2) For sugarcane nitrogen (δ15N) content, spray irrigation with medium water and high fertilization was the best combination in seedling and tillering stages. The optimum combination in the elongation stage was drip irrigation with medium water and high fertilization, and in maturity stage was drip irrigation with high water and high fertilization. (3) For soil (δ15N content), drip irrigation with high water and high fertilization proved optimal for seedling, tillering, and maturity stages. (4) In seedling stage, sugarcane (δ15N content) was found to be strongly correlated with leaf area index, soil water, soil temperature, and soil electrical conductivity. Soil (δ15N content) was correlated with photosynthesis and soil temperature. In conclusion, drip irrigation appears most suitable for field planting, while the best treatment in seedling and tillering stages is medium water-high fertilization, and that the best in elongation stage is high water-medium fertilization. The optimum water-fertilizer combinations identified here can provide a scientific basis for optimization and management of irrigation and fertilization in China and other regions with similar environments.
اللغةen
الناشرMDPI
الموضوعsugarcane
water-fertilization coupling
drip irrigation
spray irrigation
δ15N content
isotope technique
العنوانOptimal Water-Fertilizer Combinations for Efficient Nitrogen Fixation by Sugarcane at Different Stages of Growth
النوعArticle
رقم المجلد13
dc.accessType Open Access


الملفات في هذه التسجيلة

Thumbnail

هذه التسجيلة تظهر في المجموعات التالية

عرض بسيط للتسجيلة