Paper · 2007 · Chinese Journal of Tropical Agriculture

Effect of Different Levels of Nitrogen on Yield and Quality of the Chinese Cabbage under Shelter Cultivation

Yanli Chen

4
claims
4
verbatim quotes
0
citations
2
research areas
—
Not open access

Abstract

Chinese cabbage (Brassica campestris Linnaeus ssp. chinensis (L.) Makino) was planted under 57% shade at a spacing of 20 cm × 25 cm, 60 plants each plot covering 3 square meters, and treated with 4 levels of nitrogen. A randomized block design was arranged with 3 replications. The results showed that the treatment with 150 kg/ha of nitrogen produced the highest yield of Chinese cabbage which contained rather lower nitrate but obviously higher Vitamin C, soluble protein and soluble sugar than other treatments. This treatment (150 kg/ha) is considered optimum for shelter cultivation of Chinese cabbage.

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Claims 4

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Nitrogen at 150 kg/ha gave the highest yield of Chinese cabbage among the four nitrogen levels under shelter cultivation.

Treatment
150 kg/ha of nitrogene0
Outcome
yielde0
Direction
higheste0
Comparator
other treatmentse0

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

Brassica rapa subsp. pekinensis
Brassica rapa subsp. pekinensis · Taxondekochan · Public domain · Wikimedia Commons ↗

Verbatim

e0

“the treatment with 150 kg/ha of nitrogen produced the highest yield of Chinese cabbage which contained rather lower nitrate but obviously higher Vitamin C, soluble protein and soluble sugar than other treatments”

✓ located verbatim in the source · abstract, characters 302–513 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The 150 kg/ha nitrogen treatment gave lower nitrate content in Chinese cabbage than the other treatments.

Treatment
150 kg/ha of nitrogene0
Outcome
nitratee0
Direction
lowere0
Comparator
other treatmentse0

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

Brassica rapa subsp. pekinensis
Brassica rapa subsp. pekinensis · Taxondekochan · Public domain · Wikimedia Commons ↗

Verbatim

e0

“the treatment with 150 kg/ha of nitrogen produced the highest yield of Chinese cabbage which contained rather lower nitrate but obviously higher Vitamin C, soluble protein and soluble sugar than other treatments”

✓ located verbatim in the source · abstract, characters 302–513 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The 150 kg/ha nitrogen treatment gave higher vitamin C, soluble protein and soluble sugar contents in Chinese cabbage than the other treatments.

Treatment
150 kg/ha of nitrogene0
Outcome
Vitamin C, soluble protein and soluble sugare0
Direction
highere0
Comparator
other treatmentse0

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

Brassica rapa subsp. pekinensis
Brassica rapa subsp. pekinensis · Taxondekochan · Public domain · Wikimedia Commons ↗

Verbatim

e0

“the treatment with 150 kg/ha of nitrogen produced the highest yield of Chinese cabbage which contained rather lower nitrate but obviously higher Vitamin C, soluble protein and soluble sugar than other treatments”

✓ located verbatim in the source · abstract, characters 302–513 · show in text ↑
Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

150 kg/ha nitrogen is recommended as optimum for shelter cultivation of Chinese cabbage.

Treatment
150 kg/hae0
Outcome
optimume0
Setting
shelter cultivatione0

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

Brassica rapa subsp. pekinensis
Brassica rapa subsp. pekinensis · Taxondekochan · Public domain · Wikimedia Commons ↗

Verbatim

e0

“This treatment (150 kg/ha) is considered optimum for shelter cultivation of Chinese cabbage”

✓ located verbatim in the source · abstract, characters 515–606 · show in text ↑

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nitrogen · yield · Brassica rapa (field mustard)Positive and negative results

43 papers: 37 positive, 6 negative or no effect

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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.