Abstract
Abstract Through unflooded mulching in field plots and 15nitrogen microplot tracer experiments, nitrogen (N) uptake of rice and N utilization have been studied compared with normal irrigation cultivation. The results showed that N uptake of unflooded rice and N derived from fertilizer (NDFF) of root, stem, and grain under mulching cultivation were lower than that under cultivation without mulching. However, the NDFF of rice under unflooded cultivation was higher than that under normal irrigation cultivation. The N utilization has been greatly enhanced under unflooded cultivation without mulching and unflooded plastic film cultivation with mulching as compared with normal irrigation. At the same time, there was no significant difference on the N uptake of unflooded rice among different ways of mulching cultivations. During the growth period of rice, no prominent differences were found in the soil residue, recovery, and N losses of fertilizer except the N uptake of rice between unflooded mulching and normal irrigation. The yield of rice under film mulching and straw mulching cultivation was higher than that of cultivation without mulching in the condition of unflooded cultivation, whereas the yield of rice under irrigation cultivation was higher than that under unflooded cultivation. Keywords: Fate of fertilizer N 15NN utilizationriceunflooded mulching cultivation
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Claims 9
Claim · model-written summary
Mulching lowered rice nitrogen uptake and fertilizer-derived nitrogen in roots, stems and grains relative to cultivation without mulch.
- Taxon
- rice
Oryza sativae0 - Treatment
- mulching cultivatione0
- Outcome
- N uptake of unflooded rice and N derived from fertilizer (NDFF) of root, stem, and graine0
- Direction
- lowere0
- Comparator
- cultivation without mulchinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N uptake of unflooded rice and N derived from fertilizer (NDFF) of root, stem, and grain under mulching cultivation were lower than that under cultivation without mulching”
Claim · model-written summary
Unflooded cultivation increased fertilizer-derived nitrogen in rice relative to normal irrigation.
- Taxon
- riceOryza sativae0
- Treatment
- unflooded cultivatione0
- Outcome
- NDFF of ricee0
- Direction
- highere0
- Comparator
- normal irrigation cultivatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NDFF of rice under unflooded cultivation was higher than that under normal irrigation cultivation”
Claim · model-written summary
Unflooded cultivation without mulch enhanced nitrogen utilization compared with normal irrigation.
- Taxon
- riceOryza sativat0
- Treatment
- unflooded cultivation without mulchinge0
- Outcome
- N utilizatione0
- Direction
- enhancede0
- Comparator
- normal irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N utilization has been greatly enhanced under unflooded cultivation without mulching and unflooded plastic film cultivation with mulching as compared with normal irrigation”
t0“Rice”
Claim · model-written summary
Unflooded plastic film mulching enhanced nitrogen utilization compared with normal irrigation.
- Taxon
- riceOryza sativat0
- Treatment
- unflooded plastic film cultivation with mulchinge0
- Outcome
- N utilizatione0
- Direction
- enhancede0
- Comparator
- normal irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N utilization has been greatly enhanced under unflooded cultivation without mulching and unflooded plastic film cultivation with mulching as compared with normal irrigation”
t0“Rice”
Claim · model-written summary
Rice nitrogen uptake did not differ significantly among unflooded mulching methods.
- Taxon
- riceOryza sativae0
- Treatment
- different ways of mulching cultivationse0
- Outcome
- N uptake of unflooded ricee0
- Direction
- no significant differencee0
- Comparator
- different ways of mulching cultivationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant difference on the N uptake of unflooded rice among different ways of mulching cultivations”
Claim · model-written summary
Soil fertilizer nitrogen residue, recovery and losses showed no prominent differences between unflooded mulching and normal irrigation.
- Taxon
- riceOryza sativae0
- Treatment
- unflooded mulchinge0
- Outcome
- soil residue, recovery, and N losses of fertilizere0
- Direction
- no prominent differencese0
- Comparator
- normal irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no prominent differences were found in the soil residue, recovery, and N losses of fertilizer except the N uptake of rice between unflooded mulching and normal irrigation”
Claim · model-written summary
Rice yield under film mulching exceeded yield without mulch in unflooded cultivation.
- Taxon
- riceOryza sativae0
- Treatment
- film mulchinge0
- Outcome
- yield of ricee0
- Direction
- highere0
- Comparator
- cultivation without mulchinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield of rice under film mulching and straw mulching cultivation was higher than that of cultivation without mulching in the condition of unflooded cultivation”
Claim · model-written summary
Rice yield under straw mulching exceeded yield without mulch in unflooded cultivation.
- Taxon
- riceOryza sativae0
- Treatment
- straw mulching cultivatione0
- Outcome
- yield of ricee0
- Direction
- highere0
- Comparator
- cultivation without mulchinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield of rice under film mulching and straw mulching cultivation was higher than that of cultivation without mulching in the condition of unflooded cultivation”
Claim · model-written summary
Rice yield under irrigation exceeded yield under unflooded cultivation.
- Taxon
- riceOryza sativae0
- Treatment
- irrigation cultivatione0
- Outcome
- yield of ricee0
- Direction
- highere0
- Comparator
- unflooded cultivatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield of rice under irrigation cultivation was higher than that under unflooded cultivation”
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See all 1,171 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.