Abstract
【Objective】The sudangrass and ryegrass rotation is a new type of cropping system in the south of China,and it develops very fast in recent years.Guidelines for proper fertilization are needed for improvement of soil fertility in this rotation. 【Method】The effects of NPK fertilizers on forage yield,sucrase,urease and phosphatase in soil under sudangrass and ryegrass rotation regime were studied based on the four-year fixed location field experiments.【Result】The results indicated that the NPK combination significantly increased the fresh yield of sudangrass and ryegrass.The total yield in NPK treatment was the highest among all treatments from 2005 to 2009,and was 17.9%,17.3%,21.7%,and 23.2%higher than that of NP treatment,26.9%,20.2%,23.3%,and 25.9%higher than that of NK treatment,and 312.9%,339.8%,231.7%,and 223.1%higher than that of PK treatment,respectively.In the rotation,the activities of soil sucrase and urease in NPK treatment were higher than that in CK and PK treatments,while were similar to that of NP and NK treatments.For soil phosphatase,alkaline phosphatase activity was higher than acid phosphatase activity in the rotation,and NP,NK and NPK treatments were lower than CK and PK treatments.【Conclusion】The combination of N,P and K fertilizers could increase yield of forage,influence the activities of sucrase,urease and phosphatase in soil and improve soil fertility in the sudangrass and ryegrass rotation system.
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Claims 10
Claim · model-written summary
NPK fertilization significantly increased the fresh yield of sudangrass and ryegrass
- Taxon
- sudangrass and ryegrass
Lolium
Sorghum ×drummondiie1 - Treatment
- NPK combinatione1
- Outcome
- fresh yielde1
- Direction
- increasede1
- Setting
- fixed location field experimentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the NPK combination significantly increased the fresh yield of sudangrass and ryegrass”
e0“based on the four-year fixed location field experiments”
Claim · model-written summary
NPK treatment gave the highest total forage yield among all treatments from 2005 to 2009
- Taxon
- sudangrass and ryegrassLoliumSorghum ×drummondiie1
- Treatment
- NPKe2
- Outcome
- total yielde2
- Direction
- the higheste2
- Comparator
- all treatmentse2
- Setting
- fixed location field experimentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the NPK combination significantly increased the fresh yield of sudangrass and ryegrass”
e2“The total yield in NPK treatment was the highest among all treatments from 2005 to 2009”
e0“based on the four-year fixed location field experiments”
Claim · model-written summary
NPK total yield was 17.9%, 17.3%, 21.7% and 23.2% higher than NP treatment across the four years
- Taxon
- sudangrass and ryegrassLoliumSorghum ×drummondiie1
- Treatment
- NPKe2
- Outcome
- total yielde2
- Direction
- highere3
- Value
- 17.9%,17.3%,21.7%,and 23.2%e3
- Comparator
- NP treatmente3
- Setting
- fixed location field experimentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the NPK combination significantly increased the fresh yield of sudangrass and ryegrass”
e2“The total yield in NPK treatment was the highest among all treatments from 2005 to 2009”
e3“17.9%,17.3%,21.7%,and 23.2%higher than that of NP treatment,26.9%,20.2%,23.3%,and 25.9%higher than that of NK treatment,and 312.9%,339.8%,231.7%,and 223.1%higher than that of PK treatment”
e0“based on the four-year fixed location field experiments”
Claim · model-written summary
NPK total yield was 26.9%, 20.2%, 23.3% and 25.9% higher than NK treatment across the four years
- Taxon
- sudangrass and ryegrassLoliumSorghum ×drummondiie1
- Treatment
- NPKe2
- Outcome
- total yielde2
- Direction
- highere3
- Value
- 26.9%,20.2%,23.3%,and 25.9%e3
- Comparator
- NK treatmente3
- Setting
- fixed location field experimentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the NPK combination significantly increased the fresh yield of sudangrass and ryegrass”
e2“The total yield in NPK treatment was the highest among all treatments from 2005 to 2009”
e3“17.9%,17.3%,21.7%,and 23.2%higher than that of NP treatment,26.9%,20.2%,23.3%,and 25.9%higher than that of NK treatment,and 312.9%,339.8%,231.7%,and 223.1%higher than that of PK treatment”
e0“based on the four-year fixed location field experiments”
Claim · model-written summary
NPK total yield was 312.9%, 339.8%, 231.7% and 223.1% higher than PK treatment across the four years
- Taxon
- sudangrass and ryegrassLoliumSorghum ×drummondiie1
- Treatment
- NPKe2
- Outcome
- total yielde2
- Direction
- highere3
- Value
- 312.9%,339.8%,231.7%,and 223.1%e3
- Comparator
- PK treatmente3
- Setting
- fixed location field experimentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the NPK combination significantly increased the fresh yield of sudangrass and ryegrass”
e2“The total yield in NPK treatment was the highest among all treatments from 2005 to 2009”
e3“17.9%,17.3%,21.7%,and 23.2%higher than that of NP treatment,26.9%,20.2%,23.3%,and 25.9%higher than that of NK treatment,and 312.9%,339.8%,231.7%,and 223.1%higher than that of PK treatment”
e0“based on the four-year fixed location field experiments”
Claim · model-written summary
NPK treatment raised soil sucrase and urease activities above CK and PK treatments in the rotation
- Taxon
- sudangrass and ryegrassLoliumSorghum ×drummondiie1
- Treatment
- NPKe4
- Outcome
- activities of soil sucrase and ureasee4
- Direction
- highere4
- Comparator
- CK and PK treatmentse4
- Setting
- fixed location field experimentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the NPK combination significantly increased the fresh yield of sudangrass and ryegrass”
e4“In the rotation, the activities of soil sucrase and urease in NPK treatment were higher than that in CK and PK treatments”
e0“based on the four-year fixed location field experiments”
Claim · model-written summary
In the rotation, soil alkaline phosphatase activity was higher than acid phosphatase activity
- Taxon
- sudangrass and ryegrassLoliumSorghum ×drummondiie1
- Outcome
- alkaline phosphatase activitye5
- Direction
- highere5
- Comparator
- acid phosphatase activitye5
- Setting
- fixed location field experimentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the NPK combination significantly increased the fresh yield of sudangrass and ryegrass”
e5“For soil phosphatase, alkaline phosphatase activity was higher than acid phosphatase activity in the rotation, and NP,NK and NPK treatments were lower than CK and PK treatments”
e0“based on the four-year fixed location field experiments”
Claim · model-written summary
NP, NK and NPK treatments gave lower soil phosphatase than CK and PK treatments
- Taxon
- sudangrass and ryegrassLoliumSorghum ×drummondiie1
- Treatment
- NP,NK and NPK treatmentse5
- Outcome
- soil phosphatasee5
- Direction
- lowere5
- Comparator
- CK and PK treatmentse5
- Setting
- fixed location field experimentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the NPK combination significantly increased the fresh yield of sudangrass and ryegrass”
e5“For soil phosphatase, alkaline phosphatase activity was higher than acid phosphatase activity in the rotation, and NP,NK and NPK treatments were lower than CK and PK treatments”
e0“based on the four-year fixed location field experiments”
Claim · model-written summary
The N, P and K fertilizer combination could increase forage yield in the sudangrass and ryegrass rotation
- Taxon
- sudangrass and ryegrassLoliumSorghum ×drummondiie1
- Treatment
- The combination of N,P and K fertilizerse6
- Outcome
- yield of foragee6
- Direction
- increasee6
- Setting
- fixed location field experimentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the NPK combination significantly increased the fresh yield of sudangrass and ryegrass”
e6“The combination of N,P and K fertilizers could increase yield of forage, influence the activities of sucrase, urease and phosphatase in soil and improve soil fertility in the sudangrass and ryegrass rotation system”
e0“based on the four-year fixed location field experiments”
Claim · model-written summary
The N, P and K fertilizer combination could improve soil fertility in the sudangrass and ryegrass rotation
- Taxon
- sudangrass and ryegrassLoliumSorghum ×drummondiie1
- Treatment
- The combination of N,P and K fertilizerse6
- Outcome
- soil fertilitye6
- Direction
- improvee6
- Setting
- fixed location field experimentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the NPK combination significantly increased the fresh yield of sudangrass and ryegrass”
e6“The combination of N,P and K fertilizers could increase yield of forage, influence the activities of sucrase, urease and phosphatase in soil and improve soil fertility in the sudangrass and ryegrass rotation system”
e0“based on the four-year fixed location field experiments”
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See all 54 papers →8 of 11 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.