Abstract
To understand root regulation on rapeseed yield by easy and reduced cultivation technique,a field experiment was conducted to investigate the distribution of root population under two cultivation methods and two nitrogen fertilization levels. The cultivation methods were direct drilling at 450 000 plants per hectare,and transplanting at 120 000 plants per hectare. The two fertilization levels included pure nitrogen of 180kg per hectare and 270kg per hectare. Cultivar Zhongshuang 11 and Zhongyouza 12 were used as plant materials. Results showed that the root distribution of direct drilling was deeper. It had significant fewer roots at 0- 10cm soil layer,and significant greater distribution at both 10- 20cm and 20- 30cm layers. At initial flowering stage,root dry weight was the most important factor on population yield,and the heavier the dry weight,the higher the yield. Strong root system was also the key factor on yield. Roots grew stronger under transplanting method,and higher nitrogen rate benefited stronger root system.
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Claims 8
Claim · model-written summary
Direct drilling produced deeper root distribution than transplanting.
Verbatim
e0“the root distribution of direct drilling was deeper”
t0“direct drilling and transplanting on root system and rapeseed yield”
Claim · model-written summary
Direct drilling had significantly fewer roots in the 0-10 cm soil layer.
Verbatim
e0“It had significant fewer roots at 0- 10cm soil layer”
t0“direct drilling and transplanting on root system and rapeseed yield”
Claim · model-written summary
Direct drilling had significantly greater root distribution in the 10-20 cm layer.
Verbatim
e0“significant greater distribution at both 10- 20cm and 20- 30cm layers”
t0“direct drilling and transplanting on root system and rapeseed yield”
Claim · model-written summary
Direct drilling had significantly greater root distribution in the 20-30 cm layer.
Verbatim
e0“significant greater distribution at both 10- 20cm and 20- 30cm layers”
t0“direct drilling and transplanting on root system and rapeseed yield”
Claim · model-written summary
At initial flowering, greater root dry weight was associated with higher population yield and was the strongest factor examined.
Verbatim
e0“At initial flowering stage,root dry weight was the most important factor on population yield,and the heavier the dry weight,the higher the yield”
t0“root system and rapeseed yield”
Claim · model-written summary
A strong root system was identified as a key factor in yield.
Not reportedDirection
Verbatim
e0“Strong root system was also the key factor on yield”
t0“root system and rapeseed yield”
Claim · model-written summary
Transplanting produced stronger roots.
Verbatim
e0“Roots grew stronger under transplanting method”
t0“direct drilling and transplanting on root system and rapeseed yield”
Claim · model-written summary
Higher nitrogen rate benefited root strength.
Not reportedComparator
Verbatim
e0“higher nitrogen rate benefited stronger root system”
t0“root system and rapeseed yield”
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