WANG Lu, ZHU Zhanling, LIU Zhaoxia, et al. Effects of Mixtures of Different Organic Materials on Apple Seedling Growth, Nitrogen Utilization and Soil Properties[J]. 2021, 35(5): 362-368.
DOI:
WANG Lu, ZHU Zhanling, LIU Zhaoxia, et al. Effects of Mixtures of Different Organic Materials on Apple Seedling Growth, Nitrogen Utilization and Soil Properties[J]. 2021, 35(5): 362-368. DOI: 10.13870/j.cnki.stbcxb.2021.05.048.
Effects of Mixtures of Different Organic Materials on Apple Seedling Growth, Nitrogen Utilization and Soil Properties
M9T337 apple seedlings were used to study the effects of different organic materials and their combination on plant growth
nitrogen utilization and soil properties by using the 15N isotope tracer technique. There were 8 treatments:CK (chemical fertilizer)
S (straw)
B (biochar)
F (cow dung)
SB (1/2 straw + 1/2 biochar)
SF (1/2 straw + 1/2 cow dung)
FB (1/2 cow dung + 1/2 biochar)
SFB (1/3 straw + 1/3 cow dung + 1/3 biochar). The results showed that the application of organic materials promoted the growth of apple seedlings
and SFB treatment had the best fresh weight
height
stem diameter
leaf area and root activity
which were significantly higher than CK and the treatment of single organic materials. The application of organic materials decreased soil bulk density
increased soil total porosity and soil moisture content. The soil bulk density and total porosity under the combined application of biochar were better. During the treatment period
the soil mineralized nitrogen contents
the soil enzymes activities and microbial population under the treatments with mixed organic materials were better than those under the treatments with organic materials alone. Compared with CK and the single organic materials
the combined application of organic materials significantly improved the 15N utilization rate of apple seedlings and 15N residual rate in soils
reduced the 15N loss rate and the SFB treatment had the best effect. According to the comprehensive analysis
the application of different organic materials could promote the growth of apple seedlings
improve soil properties
and improve the absorption and utilization of 15N
among which the combined application of cow dung
straw and biochar (SFB treatment) had the best effect. These findings could provide a basis for the application of organic materials in apple orchard for the soil quality improvement and fertilizer reduction and efficiency.
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