Abstract
To provide the basis for the high-yield summer maize cultivar,field experiments were conducted to study the effects of subsoiling and controlled release urea on nitrogen accumulation,distribution and use efficiency and yield of summer maize in 2010 and 2011.Two sets of treatments were arranged in a split plot design.The whole-plot treatment factor was two tillage methods,rototilling for stubble breaking and subsoiling after rototilling for stubble breaking,and the sub-subplot treatments are the N 225 kg/ha controlled release urea treatment,the N 225 kg/ha conventional urea for two applications treatment(40% was used as basal application and 60% was used at the beginning of male tetrad stage),the N 225 kg/ha conventional urea treatment for one application and no nitrogen fertilizer treatment used as control.The maize cultivar,Zhengdan 958,was chosen as experiment material.The results show that in the same cultivation measure conditions,the trends of the nitrogen accumulation and distribution into the grains of all treatments are the controlled release urea treatment the conventional urea for two applications treatment the conventional urea treatment for one application the no urea treatment.Compared with the rototilling for stubble breaking,the subsoilling could increase the dry matter accumulation,nitrogen accumulation and distribution into the grains under the same nitrogen level.The yields and nitrogen use efficiencies of Zhengdan 958 in the two years are highest under the subsoiling and controlled release urea treatment,and are significantly higher than those of the other treatments.It is thus clear that the combination of subsoiling and the application of controlled release urea could provide an approach for using the nitrogen efficiently and getting higher maize yield.
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Claims 4
Claim · model-written summary
The nitrogen accumulation and distribution into grains followed the order controlled release urea, two-application conventional urea, one-application conventional urea, and no urea.
- Treatment
- controlled release ureae1
- Outcome
- nitrogen accumulation and distribution into the grainse1
- Comparator
- no urea treatmente1
Zea maysNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to study the effects of subsoiling and controlled release urea on nitrogen accumulation,distribution and use efficiency and yield of summer maize in 2010 and 2011”
e1“the trends of the nitrogen accumulation and distribution into the grains of all treatments are the controlled release urea treatment the conventional urea for two applications treatment the conventional urea treatment for one application the no urea treatment”
Claim · model-written summary
Compared with rototilling for stubble breaking, subsoiling increased dry matter accumulation, nitrogen accumulation and nitrogen distribution into grains under the same nitrogen level.
- Treatment
- subsoillinge2
- Outcome
- dry matter accumulation,nitrogen accumulation and distribution into the grainse2
- Direction
- increasee2
- Qualifier
- under the same nitrogen levele2
- Comparator
- rototilling for stubble breakinge2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to study the effects of subsoiling and controlled release urea on nitrogen accumulation,distribution and use efficiency and yield of summer maize in 2010 and 2011”
e2“Compared with the rototilling for stubble breaking,the subsoilling could increase the dry matter accumulation,nitrogen accumulation and distribution into the grains under the same nitrogen level”
Claim · model-written summary
Yields and nitrogen use efficiencies of Zhengdan 958 in both years were highest under subsoiling with controlled release urea and significantly higher than under the other treatments.
- Material
- Zhengdan 958e3
- Treatment
- subsoiling and controlled release urea treatmente3
- Outcome
- yields and nitrogen use efficienciese3
- Direction
- higheste3
- Qualifier
- in the two yearse3
- Comparator
- other treatmentse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to study the effects of subsoiling and controlled release urea on nitrogen accumulation,distribution and use efficiency and yield of summer maize in 2010 and 2011”
e3“The yields and nitrogen use efficiencies of Zhengdan 958 in the two years are highest under the subsoiling and controlled release urea treatment,and are significantly higher than those of the other treatments”
Claim · model-written summary
Combining subsoiling with controlled release urea could provide an approach to use nitrogen efficiently and obtain higher maize yield.
- Treatment
- combination of subsoiling and the application of controlled release ureae4
- Outcome
- higher maize yielde4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“It is thus clear that the combination of subsoiling and the application of controlled release urea could provide an approach for using the nitrogen efficiently and getting higher maize yield”
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