Abstract
Long-term experiment of Gongzhuling base for the study through three treatments(1)NPK: NPK fertilizer; (2)N165M: Manure and NPK fertilizer; (3)1.5M+NPK: 1.5Manure and NPK fertilizer, used DSSAT-Century soil model to study the long-term effects of different fertilizer treatments on soil organic carbon, total nitrogen content and the laws of growth and decline. The results show that: long-term application of nitrogen fertilizer can significantly improve crop yields compare with NPK.. Corn production is also affected by climatic conditions, especially in drought years with less precipitation. Larger impact of organic manure on soil organic carbon (SOC)and total nitrogen, SOC content obtained in descending order of 1.5M + N165> N165> N0 by Century model simulation. Soil organic carbon content and nitrogen content has a certain relevance, and the trend is consistent. Organic manure and inorganic fertilizer can significantly reduce soil inorganic nitrogen content and reduce the risk of nitrogen leaching. Through model simulations C / N ratio could be explained: C / N increases indicated an increase of organic carbon faster than organic nitrogen in soil, and changes of soil chronic library SOM2 determined organic carbon content. Therefore we should pay attention to organic manure carbon return level, vigorously promote the use of farmyard manure to improve soil nutrient content.
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Claims 9
Claim · model-written summary
Long-term nitrogen fertilizer application significantly improved crop yields compared with NPK.
- Treatment
- long-term application of nitrogen fertilizere0
- Outcome
- crop yieldse0
- Direction
- improvee0
- Comparator
- NPKe0
Not reportedTaxon
Verbatim
e0“long-term application of nitrogen fertilizer can significantly improve crop yields compare with NPK”
Claim · model-written summary
Corn production is affected by climatic conditions, especially in drought years with less precipitation.
- Taxon
- Corn
Zea mays subsp. mayse0 - Treatment
- climatic conditionse0
- Outcome
- Corn productione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn production is also affected by climatic conditions, especially in drought years with less precipitation”
Claim · model-written summary
Organic manure had a larger impact on soil organic carbon and total nitrogen.
- Treatment
- organic manuree0
- Outcome
- soil organic carbon (SOC)and total nitrogene0
- Direction
- Larger impacte0
Not reportedTaxonComparator
Verbatim
e0“Larger impact of organic manure on soil organic carbon (SOC)and total nitrogen”
Claim · model-written summary
By Century simulation, SOC content ranked in descending order 1.5M + N165 > N165 > N0.
Not reportedTaxon
Verbatim
e0“SOC content obtained in descending order of 1.5M + N165> N165> N0 by Century model simulation”
Claim · model-written summary
Soil organic carbon content and nitrogen content are related and show a consistent trend.
Not reportedTaxonDirection
Verbatim
e0“Soil organic carbon content and nitrogen content has a certain relevance, and the trend is consistent”
Claim · model-written summary
Organic manure and inorganic fertilizer significantly reduced soil inorganic nitrogen content and the risk of nitrogen leaching.
- Treatment
- Organic manure and inorganic fertilizere0
- Outcome
- soil inorganic nitrogen content and reduce the risk of nitrogen leachinge0
- Direction
- reducee0
Not reportedTaxonComparator
Verbatim
e0“Organic manure and inorganic fertilizer can significantly reduce soil inorganic nitrogen content and reduce the risk of nitrogen leaching”
Claim · model-written summary
Increasing soil C/N indicated organic carbon increased faster than organic nitrogen.
Not reportedTaxon
Verbatim
e0“C / N increases indicated an increase of organic carbon faster than organic nitrogen in soil”
Claim · model-written summary
Changes in the soil chronic library SOM2 determined organic carbon content.
Not reportedTaxon
Verbatim
e0“changes of soil chronic library SOM2 determined organic carbon content”
Claim · model-written summary
The authors recommend attending to organic manure carbon return and promoting farmyard manure to improve soil nutrient content.
- Outcome
- improve soil nutrient contente0
Not reportedTaxon
Verbatim
e0“we should pay attention to organic manure carbon return level, vigorously promote the use of farmyard manure to improve soil nutrient content”