Abstract
Through taking four-year direct-seeding close-planting jun-jujubes as materials and studying the influence of different application amounts of potassium fertilizer on the dynamics of nitrogen nutrition of soil and plants in jujube orchards, the result shows that different application amounts of potassium fertilizer will reduce soil alkali-hydrolyzable nitrogen content to different degrees. Soil alkali-hydrolyzable nitrogen content in different soil depths is always relatively low at the stage before leaf expansion and relatively high at blossom stage or fruit-set stage. There is an obvious linear negative correlation between the application amount of potassium fertilizer and soil alkali-hydrolyzable nitrogen content in 0-20cm depth at the stage before leaf expansion (r = -0.8769*). The application amount of potassium fertilizer is positively correlated with soil alkali-hydrolyzable nitrogen content in 20-40 cm depth at fruit-set stage remarkably (r = 0.95678*). The application amount of potassium fertilizer is negatively correlated with soil alkali-hydrolyzable nitrogen content in 40-60 cm depth at fruit maturation stage exponentially (r = -0.9835**). Applying 30 kg/667 m 2 of potassium fertilizer is beneficial to the absorption and accumulation of nitrogen in fruit branches before fruit-set stage. With regard to the different organs of jujubes at different growth stages, applying potassium fertilizer appropriately can effectively promote the nitrogen absorption of jujube plants, while applying potassium fertilizer excessively will curb the nitrogen absorption of jujube plants. The application amount of potassium fertilizer is significantly correlated with the nitrogen content in jujube secondary branches at the stage before leaf expansion (r = 0.9823**), obviously correlated with total nitrogen content in roots (r = 0.9673*), positively correlated with jujube leaves and total nitrogen content in roots at blossom stage remarkably (r = 0.9513*, 0.9456*) and notably correlated with total nitrogen content in secondary branches at fruit-set stage (r = 0.9455*).
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Claims 14
Claim · model-written summary
Potassium fertilizer reduced soil alkali-hydrolyzable nitrogen content to varying degrees.
- Taxon
- jun-jujubese1
- Treatment
- different application amounts of potassium fertilizere0
- Outcome
- soil alkali-hydrolyzable nitrogen contente0
- Direction
- reducee0
Not reportedComparator
Verbatim
e0“different application amounts of potassium fertilizer will reduce soil alkali-hydrolyzable nitrogen content to different degrees”
e1“four-year direct-seeding close-planting jun-jujubes”
Claim · model-written summary
Soil alkali-hydrolyzable nitrogen was relatively low before leaf expansion across depths.
Verbatim
e0“Soil alkali-hydrolyzable nitrogen content in different soil depths is always relatively low at the stage before leaf expansion”
e1“jun-jujubes”
Claim · model-written summary
Soil alkali-hydrolyzable nitrogen was relatively high at blossom or fruit-set stage.
Verbatim
e0“relatively high at blossom stage or fruit-set stage”
e1“Soil alkali-hydrolyzable nitrogen content in different soil depths”
e2“jun-jujubes”
Claim · model-written summary
Potassium fertilizer amount correlated negatively with soil alkali-hydrolyzable nitrogen at 0-20cm before leaf expansion (r = -0.8769*).
Verbatim
e0“application amount of potassium fertilizer and soil alkali-hydrolyzable nitrogen content in 0-20cm depth at the stage before leaf expansion (r = -0.8769*)”
e1“obvious linear negative correlation”
e2“jun-jujubes”
Claim · model-written summary
Potassium fertilizer amount correlated positively with soil alkali-hydrolyzable nitrogen at 20-40 cm at fruit set (r = 0.95678*).
Verbatim
e0“application amount of potassium fertilizer is positively correlated with soil alkali-hydrolyzable nitrogen content in 20-40 cm depth at fruit-set stage remarkably (r = 0.95678*)”
e1“jun-jujubes”
Claim · model-written summary
Potassium fertilizer amount correlated negatively with soil alkali-hydrolyzable nitrogen at 40-60 cm at fruit maturation (r = -0.9835**).
Verbatim
e0“application amount of potassium fertilizer is negatively correlated with soil alkali-hydrolyzable nitrogen content in 40-60 cm depth at fruit maturation stage exponentially (r = -0.9835**)”
e1“jun-jujubes”
Claim · model-written summary
Applying 30 kg/667 m 2 potassium fertilizer benefited nitrogen absorption and accumulation in fruit branches before fruit set.
- Taxon
- jun-jujubese1
- Organ / stage
- fruit branches before fruit-set stagee0
- Treatment
- Applying 30 kg/667 m 2 of potassium fertilizere0
- Outcome
- absorption and accumulation of nitrogene0
- Direction
- beneficiale0
Not reportedComparator
Verbatim
e0“Applying 30 kg/667 m 2 of potassium fertilizer is beneficial to the absorption and accumulation of nitrogen in fruit branches before fruit-set stage”
e1“jun-jujubes”
Claim · model-written summary
Appropriate potassium fertilizer promoted nitrogen absorption by jujube plants.
- Taxon
- jujubee0
- Treatment
- applying potassium fertilizer appropriatelye0
- Outcome
- nitrogen absorptione0
- Direction
- promotee0
Not reportedComparator
Verbatim
e0“applying potassium fertilizer appropriately can effectively promote the nitrogen absorption of jujube plants”
Claim · model-written summary
Excess potassium fertilizer curbed nitrogen absorption by jujube plants.
- Taxon
- jujubee0
- Treatment
- applying potassium fertilizer excessivelye0
- Outcome
- nitrogen absorptione0
- Direction
- curbe0
Not reportedComparator
Verbatim
e0“applying potassium fertilizer excessively will curb the nitrogen absorption of jujube plants”
Claim · model-written summary
Fertilizer amount correlated with nitrogen content of jujube secondary branches before leaf expansion (r = 0.9823**).
- Taxon
- jujubee0
- Organ / stage
- secondary branchese0
- Treatment
- application amount of potassium fertilizere0
- Outcome
- nitrogen contente0
- Value
- r = 0.9823**e0
- Qualifier
- stage before leaf expansione0
Not reportedDirection
Verbatim
e0“application amount of potassium fertilizer is significantly correlated with the nitrogen content in jujube secondary branches at the stage before leaf expansion (r = 0.9823**)”
Claim · model-written summary
Fertilizer amount correlated with total nitrogen in roots (r = 0.9673*).
- Taxon
- jujubee0
- Organ / stage
- rootse0
- Treatment
- application amount of potassium fertilizere0
- Outcome
- total nitrogen contente0
- Value
- r = 0.9673*e0
Not reportedDirection
Verbatim
e0“application amount of potassium fertilizer is significantly correlated with the nitrogen content in jujube secondary branches at the stage before leaf expansion (r = 0.9823**), obviously correlated with total nitrogen content in roots (r = 0.9673*)”
Claim · model-written summary
Fertilizer amount correlated positively with nitrogen content in jujube leaves at blossom stage (r = 0.9513*).
Verbatim
e0“application amount of potassium fertilizer is significantly correlated with the nitrogen content in jujube secondary branches at the stage before leaf expansion (r = 0.9823**), obviously correlated with total nitrogen content in roots (r = 0.9673*), positively correlated with jujube leaves and total nitrogen content in roots at blossom stage remarkably (r = 0.9513*, 0.9456*)”
Claim · model-written summary
Fertilizer amount correlated positively with total nitrogen in roots at blossom stage (r = 0.9456*).
Verbatim
e0“application amount of potassium fertilizer is significantly correlated with the nitrogen content in jujube secondary branches at the stage before leaf expansion (r = 0.9823**), obviously correlated with total nitrogen content in roots (r = 0.9673*), positively correlated with jujube leaves and total nitrogen content in roots at blossom stage remarkably (r = 0.9513*, 0.9456*)”
Claim · model-written summary
Fertilizer amount correlated with total nitrogen in secondary branches at fruit set (r = 0.9455*).
- Taxon
- jujubee0
- Organ / stage
- secondary branchese0
- Treatment
- application amount of potassium fertilizere0
- Outcome
- total nitrogen contente0
- Value
- r = 0.9455*e0
- Qualifier
- fruit-set stagee0
Not reportedDirection
Verbatim
e0“application amount of potassium fertilizer is significantly correlated with the nitrogen content in jujube secondary branches at the stage before leaf expansion (r = 0.9823**), obviously correlated with total nitrogen content in roots (r = 0.9673*), positively correlated with jujube leaves and total nitrogen content in roots at blossom stage remarkably (r = 0.9513*, 0.9456*) and notably correlated with total nitrogen content in secondary branches at fruit-set stage (r = 0.9455*)”
The same questions in other papers
fertilization · nutrient: content · Ziziphus jujuba (Chinese jujube)Positive and negative results
5 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
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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.