Abstract
Two tunnel experiments with 16 pakchoi cultivars were conducted under organic (ORG) and conventional management systems (CON) in fall and winter to investigate the yield, total N uptake, N uptake efficiency (plant aboveground N uptake at harvest per unit plant available N; NUpE), utilization efficiency (plant dry weight per unit plant aboveground N uptake at harvest; NUtE) and specific adaptation of cultivars. Yields under ORG were significantly lower than those under CON, whereas the NUpE in organic pakchoi were significantly higher than those in conventional pakchoi. In winter, a significant interaction between the management system and cultivar for NUtE was observed. In addition, all the traits determined were significantly influenced by the cultivar. Among cultivars, the yield was closely correlated with the NUpE under ORG and CON, except under ORG in fall. The cultivar ranking analysis showed a rank correlation for yield, NUpE and NUtE in winter, while no rank correlation was observed in fall. The rankings of cultivars showed major changes between ORG and CON in fall. In conclusion, the selection of cultivars with high NUpE and direct selection of cultivars under organic agriculture, particularly in fall, will be helpful to improve the yield.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
Pakchoi yields were significantly lower under organic than conventional management.
Verbatim
e0“Yields under ORG were significantly lower than those under CON”
t0“pakchoi cultivars”
Claim · model-written summary
Nitrogen uptake efficiency was significantly higher in organic than conventional pakchoi.
Verbatim
e0“the NUpE in organic pakchoi were significantly higher than those in conventional pakchoi”
Claim · model-written summary
In winter, management system and cultivar interacted significantly for nitrogen utilization efficiency.
Not reportedDirection
Verbatim
e0“In winter, a significant interaction between the management system and cultivar for NUtE was observed.”
t0“pakchoi cultivars”
Claim · model-written summary
All measured traits differed significantly by pakchoi cultivar.
Not reportedDirection
Verbatim
e0“all the traits determined were significantly influenced by the cultivar”
t0“pakchoi cultivars”
Claim · model-written summary
Across cultivars, yield correlated closely with nitrogen uptake efficiency in both systems except organic management in fall.
Verbatim
e0“the yield was closely correlated with the NUpE under ORG and CON, except under ORG in fall”
t0“pakchoi cultivars”
Claim · model-written summary
Cultivar ranks correlated across systems for yield, nitrogen uptake efficiency and utilization efficiency in winter.
Not reportedDirection
Verbatim
e0“a rank correlation for yield, NUpE and NUtE in winter”
t0“pakchoi cultivars”
Claim · model-written summary
Cultivar ranks did not correlate across systems in fall.
Verbatim
e0“no rank correlation was observed in fall”
t0“pakchoi cultivars”
Claim · model-written summary
Cultivar rankings changed substantially between organic and conventional management in fall.
Verbatim
e0“The rankings of cultivars showed major changes between ORG and CON in fall.”
t0“pakchoi cultivars”
Claim · model-written summary
The authors recommend selecting cultivars with high nitrogen uptake efficiency to improve organic pakchoi yield.
Verbatim
e0“the selection of cultivars with high NUpE and direct selection of cultivars under organic agriculture, particularly in fall, will be helpful to improve the yield”
t0“pakchoi cultivars”
Claim · model-written summary
The authors recommend direct cultivar selection under organic agriculture, especially in fall, to improve yield.
Verbatim
e0“direct selection of cultivars under organic agriculture, particularly in fall, will be helpful to improve the yield”
t0“pakchoi cultivars”
The same questions in other papers
cultivation system · yield · Brassica rapa (field mustard)Positive and negative results
6 in the opposite direction
- positive
- positive
- positive
3 papers more in this group
See all 7 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.