Abstract
Chinese cabbage (Brassica rapa subsp. pekinensis) production experiments with different system uniformities and field scales controlled by driplines were conducted in a solar heated greenhouse in 2009 and 2010. Three Christiansen uniformity coefficients (CU = 62, 81 and 96%) and two nitrogen application rates (150 and 300 kg/ha) were evaluated in 2009. In 2010, three CU values (57, 74, and 95%) and one nitrogen application rate (225 kg/ha) were tested. The uniformity of systems was established by randomly assembling segments of drip tubes with five different nominal emitter discharge rates (1.05, 1.4, 1.65, 2.3 and 2.6 L/h) along a dripline. For all of the system uniformities tested, the plant height, head height to diameter ratio, dry matter above ground and nitrogen uptake displayed high uniformity coefficients uality reenhouse throughout the entire growing season. The effects of system uniformity and nitrogen application rate on the mean yield and quality indexes and their uniformities were insignificant. With the increasing of field scale controlled by one dripline, the uniformity of crop growth, yield and quality indexes demonstrated a decreasing tendency. The results of this study showed that uniformity values that are lower than those recommended by the current standards can be used in drip irrigation systems, and their usage should ntrol consider the field scale co
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Claims 5
Claim · model-written summary
Plant height, head shape ratio, aboveground dry matter and nitrogen uptake remained highly uniform across tested systems.
- Taxon
- Chinese cabbage
Brassica rapa subsp. pekinensist0 - Outcome
- plant height, head height to diameter ratio, dry matter above ground and nitrogen uptakee0
- Qualifier
- all of the system uniformities testede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For all of the system uniformities tested, the plant height, head height to diameter ratio, dry matter above ground and nitrogen uptake displayed high uniformity coefficients”
t0“Chinese cabbage”
Claim · model-written summary
System uniformity had insignificant effects on mean yield and quality indexes and their uniformities.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- system uniformitye0
- Outcome
- mean yield and quality indexes and their uniformitiese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of system uniformity and nitrogen application rate on the mean yield and quality indexes and their uniformities were insignificant”
t0“Chinese cabbage”
Claim · model-written summary
Nitrogen application rate had insignificant effects on mean yield and quality indexes and their uniformities.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- nitrogen application ratee0
- Outcome
- mean yield and quality indexes and their uniformitiese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of system uniformity and nitrogen application rate on the mean yield and quality indexes and their uniformities were insignificant”
t0“Chinese cabbage”
Claim · model-written summary
Increasing field scale per dripline tended to decrease uniformity of growth, yield and quality indexes.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- field scale controlled by one driplinee0
- Outcome
- uniformity of crop growth, yield and quality indexese0
- Direction
- decreasing tendencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the increasing of field scale controlled by one dripline, the uniformity of crop growth, yield and quality indexes demonstrated a decreasing tendency”
t0“Chinese cabbage”
Claim · model-written summary
The authors concluded that drip systems can use uniformity below current standards while considering field scale.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Outcome
- uniformity values that are lower than those recommended by the current standards can be used in drip irrigation systemse0
- Qualifier
- field scalee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“uniformity values that are lower than those recommended by the current standards can be used in drip irrigation systems, and their usage should ntrol consider the field scale co”
t0“Chinese cabbage”
The same questions in other papers
nitrogen · quality: general · Brassica rapa (field mustard)Positive and negative results
4 in the opposite direction
- positive
- positive
- positive
1 paper more in this group
See all 5 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.