Abstract
Field experiments were carried out to determine the effect of different nitrogen application rates on nitrogen nutrient uptake,transfer and nitrogen utilization efficiency of dry land oil flax. The results indicated that different nitrogen application rates affected nitrogen nutrient uptake,accumulation and transfer at different growth stages,and changes tendencies were consistant. The amount of nitrogen translocation from leaf,translocation efficiency and contribution to grain were 89. 18%,83. 36% and 86. 36% higher than from stem. The nitrogen in grain,among which 47. 10%-57. 66% was transferred from leaf,22. 46%-30. 94% was transferred from stem and 21. 00%-30. 48% was absorbed from soil. The result indicated that compared to no nitrogen application,the yield of nitrogen treatments( as 27. 6,55. 2 and 82. 8 kg·hm-2) increased 10.21%,16.92% and 15.55%,respectively. The nitrogen transfer amounts,transfer efficiency and contribution efficiency of leaf and stem to grain were maximum when the nitrogen application rate was 55. 2kg·hm-2. With increased nitrogen application rate,apparent nitrogen recovery efficiency of oil flax first increased then decreased. The partial nitrogen factor productivity of oil flax decreased significantly. After taking into account of grain yield,nitrogen utilization efficiency and ecological environment,the recommended nitrogen fertilizer rate for dry land oil flax was 27. 6-55. 2kg·hm-2at the soil fertility level in our experiment.
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Claims 14
Claim · model-written summary
Nitrogen application rates affected uptake, accumulation and transfer across growth stages.
- Taxon
- oil flaxt0
- Treatment
- different nitrogen application ratese0
- Outcome
- nitrogen nutrient uptake,accumulation and transfere0
Not reportedComparatorDirection
Verbatim
e0“different nitrogen application rates affected nitrogen nutrient uptake,accumulation and transfer at different growth stages,and changes tendencies were consistant”
t0“dry land oil flax”
Claim · model-written summary
Leaf nitrogen translocation amount exceeded stem by 89.18%.
Verbatim
e0“The amount of nitrogen translocation from leaf,translocation efficiency and contribution to grain were 89. 18%,83. 36% and 86. 36% higher than from stem”
t0“dry land oil flax”
Claim · model-written summary
Leaf translocation efficiency exceeded stem by 83.36%.
Verbatim
e0“translocation efficiency and contribution to grain were 89. 18%,83. 36% and 86. 36% higher than from stem”
t0“dry land oil flax”
Claim · model-written summary
Leaf contribution to grain exceeded stem by 86.36%.
Verbatim
e0“contribution to grain were 89. 18%,83. 36% and 86. 36% higher than from stem”
t0“dry land oil flax”
Claim · model-written summary
Leaf transfer supplied 47.10–57.66% of grain nitrogen.
Verbatim
e0“47. 10%-57. 66% was transferred from leaf”
t0“dry land oil flax”
Claim · model-written summary
Stem transfer supplied 22.46–30.94% of grain nitrogen.
Verbatim
e0“22. 46%-30. 94% was transferred from stem”
t0“dry land oil flax”
Claim · model-written summary
Soil uptake supplied 21.00–30.48% of grain nitrogen.
Verbatim
e0“21. 00%-30. 48% was absorbed from soil”
t0“dry land oil flax”
Claim · model-written summary
Nitrogen at 27.6 kg·hm-2 increased yield by 10.21% against no application.
Verbatim
e0“compared to no nitrogen application,the yield of nitrogen treatments( as 27. 6,55. 2 and 82. 8 kg·hm-2) increased 10.21%,16.92% and 15.55%,respectively”
t0“dry land oil flax”
Claim · model-written summary
Nitrogen at 55.2 kg·hm-2 increased yield by 16.92%.
Verbatim
e0“compared to no nitrogen application,the yield of nitrogen treatments( as 27. 6,55. 2 and 82. 8 kg·hm-2) increased 10.21%,16.92% and 15.55%,respectively”
t0“dry land oil flax”
Claim · model-written summary
Nitrogen at 82.8 kg·hm-2 increased yield by 15.55%.
Verbatim
e0“compared to no nitrogen application,the yield of nitrogen treatments( as 27. 6,55. 2 and 82. 8 kg·hm-2) increased 10.21%,16.92% and 15.55%,respectively”
t0“dry land oil flax”
Claim · model-written summary
Leaf and stem nitrogen transfer amounts, efficiencies and contributions to grain were maximal at 55.2 kg·hm-2.
Verbatim
e0“The nitrogen transfer amounts,transfer efficiency and contribution efficiency of leaf and stem to grain were maximum when the nitrogen application rate was 55. 2kg·hm-2”
t0“dry land oil flax”
Claim · model-written summary
Apparent nitrogen recovery efficiency first rose then fell with increasing nitrogen rate.
Verbatim
e0“With increased nitrogen application rate,apparent nitrogen recovery efficiency of oil flax first increased then decreased”
Claim · model-written summary
Partial nitrogen factor productivity decreased significantly as nitrogen rate increased.
Verbatim
e0“The partial nitrogen factor productivity of oil flax decreased significantly”
t0“different nitrogen level”
Claim · model-written summary
The authors recommend 27.6–55.2 kg·hm-2 nitrogen fertilizer for dry land oil flax at the tested soil fertility.
Verbatim
e0“the recommended nitrogen fertilizer rate for dry land oil flax was 27. 6-55. 2kg·hm-2at the soil fertility level in our experiment”