PENG Ling, LIU Xiaoxia, HE Liu, et al. Effects of Root Interaction on the Apple Tree Growth, and Absorption, Utilization and Soil Residue of[J]. 2018, 32(4): 353-360.
DOI:
PENG Ling, LIU Xiaoxia, HE Liu, et al. Effects of Root Interaction on the Apple Tree Growth, and Absorption, Utilization and Soil Residue of[J]. 2018, 32(4): 353-360. DOI: 10.13870/j.cnki.stbcxb.2018.04.056.
Effects of Root Interaction on the Apple Tree Growth, and Absorption, Utilization and Soil Residue of
A pot experiment was carried out in apple-Trifolium repens Linn. (M1) and apple-Lolium perenne L. (M2) intercropping system to investigate the effects of root interaction on the growth and 15N-urea absorption
utilization
loss and residue of apple trees under different root barrier method (N1
N2 and N3 were equivalent to solid barrier
mesh barrier and no barrier
respectively)
using the 15N-labeled tracer technique. Results showed that
at new shoot growing stage
the growth index of apple trees displayed an order of N3 > N2 > N1 in M1 intercropping system
while the opposite tendency was observed in M2 intercropping system. Compared with N1 treatment
the 15N utilization rate of apple trees increased by 11.91% and 18.96% in M1 intercropping system under N2 and N3 treatment
but decreased by 5.76% and 8.99% in M2 intercropping system. The plant total N content and 15N absorption amount showed the same tendency. The effect on 15N abundance and total N content in the soil of apple trees were the most significant in N1 treatment
and the least in N3 treatment. At leaf fall period
the growth index of apple trees was obviously the highest in N3 treatment
and the lowest was found in N1 treatment. In comparison with N1 treatment
the soil 15N abundance of apple trees under N2 and N3 treatment increased by 22.33% and 34.15% in M1 intercropping system
and the rate of increase in M2 intercropping system were 13.73% and 21.44%
the total N content in the soil of apple trees showed the same tendency. There were significant differences in plant total N content
15N absorption amount and Ndff value among the treatments
which was in a trend of N3 > N2 > N1 in M1 and M2 intercropping system. The 15N utilization rate of apple trees under N2 and N3 treatment were 19.11% and 42.66% higher than that of N1 treatment
with the 15N loss rate were 13.55% and 27.12% lower than that of N1 treatment in M1 intercropping system
the same trend was showed in M2 intercropping system. Overall findings showed that it mainly showed a competitive effect in apple-Lolium perenne L. intercropping system and a relatively minor positive effect in apple-Trifolium repens Linn. intercropping system during early stages of apple growth. While in the later period of apple growth
the root interaction in forage grasses and apple trees reduced nitrogen loss and consequently improved the absorption
utilization of nitrogen nutrition and the growth of apple trees by a certain degree
and Trifolium repens Linn. played a better effect than Lolium perenne L.
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Related Author
SHA Jianchuan
GE Shunfeng
JIANG Yuanmao
FENG Yanguang
CHEN Jianming
彭 玲
王 芬
田 歌
Related Institution
College of Horticulture Science and Engineering, Shandong Agricultural University/ State Key Laboratory of Crop Biology, Tai’ an
State Key Laboratory of Crop Biology,College of Horticulture Science and Engineering,Shandong Agricultural University,Tai’an
State Key Laboratory of Crop Biology, College of Horticultural Science and Engineering, Shandong Agricultural University, Tai’an
State Key Laboratory of Crop Biology, College of Horticultural Science and Engineering, Shandong Agricultural University, Taian