Abstract
The effects of different N application rates on the growth,development and N utilization of mechanical sowing wheat in rice-wheat cropping system were studied from 2010 to 2012 in Guanghan City,Sichuan Province. Four N rates were designed: 0,105,150 and 195 kg / ha in the experiments. The results show that the increase of N rate is good for increasing the tillering ability,the numbers of effective spike,spikelet and grain per spike,but a bit of unfavorate to the grain filling. The highest yield were achieved when the N rate was 150 kg / ha in the two growing seasons and all the experimental sites with different soils textures.,When the N application rate were higher than 150 kg / ha,the yield increase less or even start to decline. Although the N accumulation and N content in the plants are continuing increase,the corresponding N agricultural use efficiency,N productivity efficiency,N uptake efficiency and N utilization efficiency are all declined,and the N harvest index and apparent N recovery efficiency have no significantly changes from 105 kg / ha to 195 kg / ha. Therefore, applying 150 kg / ha is recommended for higher yield and highest profit in the current production levels of Sichuan Basin.
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Claims 5
Claim · model-written summary
Higher N rate increased tillering ability, effective spikes, spikelets and grains per spike.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- N ratee0
- Outcome
- tillering ability,the numbers of effective spike,spikelet and grain per spikee0
- Direction
- increasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increase of N rate is good for increasing the tillering ability,the numbers of effective spike,spikelet and grain per spike”
t0“mechanical sowing wheat in rice-wheat cropping system”
Claim · model-written summary
Yield was highest at 150 kg / ha N across both seasons and all sites.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- 150 kg / hae0
- Outcome
- yielde0
- Direction
- higheste0
- Qualifier
- two growing seasons and all the experimental sites with different soils texturese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest yield were achieved when the N rate was 150 kg / ha in the two growing seasons and all the experimental sites with different soils textures”
t0“mechanical sowing wheat in rice-wheat cropping system”
Claim · model-written summary
Above 150 kg / ha, yield gains diminished or reversed.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- higher than 150 kg / hae0
- Outcome
- yielde0
- Direction
- declinee0
- Qualifier
- increase less or even start to declinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the N application rate were higher than 150 kg / ha,the yield increase less or even start to decline”
t0“mechanical sowing wheat in rice-wheat cropping system”
Claim · model-written summary
N harvest index and apparent N recovery efficiency did not significantly change between 105 and 195 kg / ha.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- 105 kg / ha to 195 kg / hae0
- Outcome
- N harvest index and apparent N recovery efficiencye0
- Direction
- no significantly changese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N harvest index and apparent N recovery efficiency have no significantly changes from 105 kg / ha to 195 kg / ha”
t0“mechanical sowing wheat in rice-wheat cropping system”
Claim · model-written summary
The authors recommended 150 kg / ha for higher yield and maximum profit.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- 150 kg / hae0
- Outcome
- higher yield and highest profite0
- Setting
- Sichuan Basine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“applying 150 kg / ha is recommended for higher yield and highest profit in the current production levels of Sichuan Basin”
t0“mechanical sowing wheat in rice-wheat cropping system”