Paper · 2004 · Journal of Shanxi Teachers University

Effects of N,P and K Combined Application on Yield and Quality of Broccoli

Yongqing Zhang

7
claims
13
verbatim quotes
1
citations
2
research areas
—
Not open access

Abstract

A field experiment was conducted to study the effect of N,P and K combined application on yield and quality of Broccoli (Brassica oleracea var italica).The results were concluded as follows: 1)In the treatment with N fertilizer alone, the yield of Broccoli were enhanced, but nitrate content were increased significantly also, the quality of Broccoli was low. However, quality of Broccoli can be improved to a certain extent by combined N, P and K, as a result the content of nitrate was decreased and the content of Vc was increased. 2) Combined N-P-K fertilization significantly enhanced the yield of Broccoli. The proper N-P-K fertilizer ratio is not only important for high yield, but also necessary for high quality of Broccoli.

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 7

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

N fertilizer alone enhanced broccoli yield

Treatment
N fertilizer alonee1
Outcome
yielde1
Direction
enhancede1
Setting
field experimente0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. italica
Brassica oleracea var. italica · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“A field experiment was conducted to study the effect of N,P and K combined application on yield and quality of Broccoli (Brassica oleracea var italica)”

✓ located verbatim in the source · abstract, characters 0–151 · show in text ↑
e1

“In the treatment with N fertilizer alone, the yield of Broccoli were enhanced, but nitrate content were increased significantly also, the quality of Broccoli was low”

✓ located verbatim in the source · abstract, characters 193–358 · show in text ↑
Intervention effectobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

N fertilizer alone increased nitrate content of broccoli significantly

Treatment
N fertilizer alonee1
Outcome
nitrate contente1
Direction
increasede1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. italica
Brassica oleracea var. italica · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“A field experiment was conducted to study the effect of N,P and K combined application on yield and quality of Broccoli (Brassica oleracea var italica)”

✓ located verbatim in the source · abstract, characters 0–151 · show in text ↑
e1

“In the treatment with N fertilizer alone, the yield of Broccoli were enhanced, but nitrate content were increased significantly also, the quality of Broccoli was low”

✓ located verbatim in the source · abstract, characters 193–358 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Broccoli quality was low under N fertilizer alone

Treatment
N fertilizer alonee1
Outcome
quality of Broccolie1
Direction
lowe1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. italica
Brassica oleracea var. italica · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“A field experiment was conducted to study the effect of N,P and K combined application on yield and quality of Broccoli (Brassica oleracea var italica)”

✓ located verbatim in the source · abstract, characters 0–151 · show in text ↑
e1

“In the treatment with N fertilizer alone, the yield of Broccoli were enhanced, but nitrate content were increased significantly also, the quality of Broccoli was low”

✓ located verbatim in the source · abstract, characters 193–358 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Combined N, P and K fertilisation decreased nitrate content of broccoli

Treatment
combined N, P and Ke2
Outcome
content of nitratee2
Direction
decreasede2

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. italica
Brassica oleracea var. italica · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“A field experiment was conducted to study the effect of N,P and K combined application on yield and quality of Broccoli (Brassica oleracea var italica)”

✓ located verbatim in the source · abstract, characters 0–151 · show in text ↑
e2

“However, quality of Broccoli can be improved to a certain extent by combined N, P and K, as a result the content of nitrate was decreased and the content of Vc was increased”

✓ located verbatim in the source · abstract, characters 360–533 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Combined N, P and K fertilisation increased vitamin C content of broccoli

Treatment
combined N, P and Ke2
Outcome
content of Vce2
Direction
increasede2

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. italica
Brassica oleracea var. italica · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“A field experiment was conducted to study the effect of N,P and K combined application on yield and quality of Broccoli (Brassica oleracea var italica)”

✓ located verbatim in the source · abstract, characters 0–151 · show in text ↑
e2

“However, quality of Broccoli can be improved to a certain extent by combined N, P and K, as a result the content of nitrate was decreased and the content of Vc was increased”

✓ located verbatim in the source · abstract, characters 360–533 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Combined N-P-K fertilization significantly enhanced broccoli yield

Treatment
Combined N-P-K fertilizatione3
Outcome
yielde3
Direction
enhancede3

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. italica
Brassica oleracea var. italica · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“A field experiment was conducted to study the effect of N,P and K combined application on yield and quality of Broccoli (Brassica oleracea var italica)”

✓ located verbatim in the source · abstract, characters 0–151 · show in text ↑
e3

“Combined N-P-K fertilization significantly enhanced the yield of Broccoli”

✓ located verbatim in the source · abstract, characters 538–611 · show in text ↑
Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

A proper N-P-K fertilizer ratio is necessary for high yield and high quality of broccoli

Treatment
proper N-P-K fertilizer ratioe4
Outcome
high yielde4

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. italica
Brassica oleracea var. italica · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e4

“The proper N-P-K fertilizer ratio is not only important for high yield, but also necessary for high quality of Broccoli”

✓ located verbatim in the source · abstract, characters 613–732 · show in text ↑

potassium · molecular: metabolites · Brassica oleracea (wild cabbage)Positive and negative results

7 papers: 5 positive, 2 negative or no effect

4 papers in the same direction as this paper · 2 in the opposite direction

  1. no effect
  2. negative
  3. positive
    Low potassium supply lowered cauliflower tissue concentration of K.

    Sodium Helps Overcome Potassium Deficiency Effects on Water Relations of Cauliflower · 1990 · compared with controls

    Same directionAbout lacking this nutrient, so it counts the other way round

3 papers more in this group

See all 7 papers →

potassium · nutrient: content · Brassica oleracea (wild cabbage)Positive and negative results

15 papers: 11 positive, 4 negative or no effect

10 papers in the same direction as this paper · 4 in the opposite direction

  1. negative
  2. no effect
  3. negative

11 papers more in this group

See all 15 papers →

phosphorus · nutrient: content · Brassica oleracea (wild cabbage)Positive and negative results

20 papers: 17 positive, 3 negative or no effect

16 papers in the same direction as this paper · 3 in the opposite direction

  1. no effect
  2. no effect
  3. negative

16 papers more in this group

See all 20 papers →

nitrogen · molecular: metabolites · Brassica oleracea (wild cabbage)Positive and negative results

22 papers: 19 positive, 3 negative or no effect

18 papers in the same direction as this paper · 2 in the opposite direction · 1 reporting no difference from an alternative

  1. no effect
  2. no effect
  3. no effect

18 papers more in this group

See all 22 papers →

nitrogen · nutrient: content · Brassica oleracea (wild cabbage)Positive and negative results

46 papers: 35 positive, 11 negative or no effect

34 papers in the same direction as this paper · 11 in the opposite direction

  1. no effect
  2. no effect
  3. negative

42 papers more in this group

See all 46 papers →

fertilization · quality: general · Brassica oleracea (wild cabbage)Positive and negative results

57 papers: 50 positive, 7 negative or no effect

6 papers in the same direction as this paper · 50 in the opposite direction

  1. positive
  2. positive
  3. positive

53 papers more in this group

See all 57 papers →

fertilization · nutrient: content · Brassica oleracea (wild cabbage)Positive and negative results

146 papers: 127 positive, 19 negative or no effect

18 papers in the same direction as this paper · 127 in the opposite direction

  1. positive
  2. positive
  3. positive

142 papers more in this group

See all 146 papers →

fertilization · yield · Brassica oleracea (wild cabbage)Positive and negative results

496 papers: 445 positive, 51 negative or no effect

444 papers in the same direction as this paper · 43 in the opposite direction · 8 reporting no difference from an alternative

  1. no effect
  2. negative
  3. negative

492 papers more in this group

See all 496 papers →

8 of 9 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.