Abstract
Long-term rotary tillage leads to thinning of the soil layer and low nitrogen use efficiency of crops, resulting in a decrease in crop yield and quality. Therefore, a new alternative method to improve nitrogen use efficiency of crops needs to be found urgently. Here, we analyzed the effects of a new smash ridge tillage method combined with reduced nitrogen application on tobacco growth and development, and nitrogen use efficiency and its economic benefits. The results showed that, compared with conventional tillage and nitrogen application of 180 kg N ha−1, smash ridge tillage and a 30% reduction in nitrogen rate resulted in greater root length density, more primary lateral roots and greater rooting depth in the subsoil. It is also beneficial to maintain a high level of biomass and nitrogen accumulation in the later growth period, increasing the output value of tobacco by CNY 1588.35 ha−1 and reducing the cost by CNY 974.1 ha−1 on average in two years. In conclusion, our study highlights the economic benefits of smash ridge tillage and nitrogen reduction for tobacco growth and development, and considers them an effective method for improving agricultural productivity and nitrogen use efficiency.
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Claims 4
Claim · model-written summary
Smash ridge tillage with a 30% nitrogen reduction gave greater root length density, more primary lateral roots and greater rooting depth in the subsoil than conventional tillage with 180 kg N ha−1.
- Taxon
- tobacco
Nicotiana tabacume0 - Organ / stage
- subsoile2
- Treatment
- smash ridge tillage and a 30% reduction in nitrogen ratee1
- Outcome
- root length density, more primary lateral roots and greater rooting depthe2
- Direction
- greatere2
- Comparator
- conventional tillage and nitrogen application of 180 kg N ha−1e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on tobacco growth and development, and nitrogen use efficiency”
e1“compared with conventional tillage and nitrogen application of 180 kg N ha−1, smash ridge tillage and a 30% reduction in nitrogen rate”
e2“resulted in greater root length density, more primary lateral roots and greater rooting depth in the subsoil”
Claim · model-written summary
Smash ridge tillage with reduced nitrogen helps maintain a high level of biomass and nitrogen accumulation in the later growth period.
- Taxon
- tobaccoNicotiana tabacume0
- Organ / stage
- later growth periode3
- Treatment
- smash ridge tillage and a 30% reduction in nitrogen ratee1
- Outcome
- biomass and nitrogen accumulatione3
- Direction
- maintain a high levele3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on tobacco growth and development, and nitrogen use efficiency”
e1“compared with conventional tillage and nitrogen application of 180 kg N ha−1, smash ridge tillage and a 30% reduction in nitrogen rate”
e3“It is also beneficial to maintain a high level of biomass and nitrogen accumulation in the later growth period”
Claim · model-written summary
Smash ridge tillage with reduced nitrogen reduced tobacco cost by CNY 974.1 ha−1 on average over two years.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- smash ridge tillage and a 30% reduction in nitrogen ratee1
- Outcome
- coste5
- Direction
- reducinge5
- Value
- CNY 974.1 ha−1e5
- Comparator
- conventional tillage and nitrogen application of 180 kg N ha−1e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on tobacco growth and development, and nitrogen use efficiency”
e1“compared with conventional tillage and nitrogen application of 180 kg N ha−1, smash ridge tillage and a 30% reduction in nitrogen rate”
e5“reducing the cost by CNY 974.1 ha−1 on average in two years”
Claim · model-written summary
The authors conclude smash ridge tillage with nitrogen reduction is an effective method for tobacco productivity and nitrogen use efficiency.
- Taxon
- tobaccoNicotiana tabacume6
- Treatment
- smash ridge tillage and nitrogen reductione6
- Outcome
- agricultural productivity and nitrogen use efficiencye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“our study highlights the economic benefits of smash ridge tillage and nitrogen reduction for tobacco growth and development, and considers them an effective method for improving agricultural productivity and nitrogen use efficiency”
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