Abstract
A field experiment was conducted to study the dry matter accumulation and nutrient uptake of 4 double-low rapeseed varieties.The results showed that the proportion of dry matter accumulation during the period of seedling(140 d after sowing),budding(140-170 d after sowing),blooming(170-199 d after sowing)and podding(199-212 d after sowing)were 12.7%-20.9%,15.3%-20.0%,60.3%-71.7% and-27.4%--9.1%,respectively.The uptake proportion of nitrogen(N)were 33.3%-47.8%,11.9%-14.7%,15.5%-28.1% and 17.7%-28.8%,of phosphorus(P2O5)were 23.4%-37.9%,22.5%-29.4%,32.7%-54.1% and-17.2%--3.0%,of potassium(K2O)were 24.7%-33.9%,16.2%-35.9%,31.0%-53.3% and-43.0%--23.5%,respectively.These results demonstrated that the dry matter accumulation and nutrient uptake trends were similar among the 4 varieties.Seedling stage was the maximum stage of nitrogen absorption,and the largest quantity of dry matter accumulation,phosphorus and potassium absorption occurred during blooming.The maximum accumulation rate of dry matter and N,P,K nutrients were all in blooming period.The amounts of N,P2O5 and K2O required by double-low rapeseed for producing every 100 kg seeds were 4.3,2.7 and 8.7 kg.Under the same fertilizer level,the seed yield of HYZ No.9 with 3 574 kg/hm2 was the highest among the 4 varieties rapeseed.The order of nutrient efficiency was ZS No.9HYZ No.9HS No.5HS No.4.
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Claims 11
Claim · model-written summary
Dry matter accumulation proportions were 12.7%-20.9%, 15.3%-20.0%, 60.3%-71.7% and -27.4%--9.1% across four stages.
Verbatim
e0“the proportion of dry matter accumulation during the period of seedling(140 d after sowing),budding(140-170 d after sowing),blooming(170-199 d after sowing)and podding(199-212 d after sowing)were 12.7%-20.9%,15.3%-20.0%,60.3%-71.7% and-27.4%--9.1%,respectively.”
t0“Rapeseed (Brassica napus L.)”
Claim · model-written summary
Nitrogen uptake proportions varied across the four stages.
Verbatim
e0“The uptake proportion of nitrogen(N)were 33.3%-47.8%,11.9%-14.7%,15.5%-28.1% and 17.7%-28.8%”
t0“Rapeseed (Brassica napus L.)”
Claim · model-written summary
Phosphorus uptake proportions varied across the four stages.
Verbatim
e0“of phosphorus(P2O5)were 23.4%-37.9%,22.5%-29.4%,32.7%-54.1% and-17.2%--3.0%”
t0“Rapeseed (Brassica napus L.)”
Claim · model-written summary
Potassium uptake proportions varied across the four stages.
Verbatim
e0“of potassium(K2O)were 24.7%-33.9%,16.2%-35.9%,31.0%-53.3% and-43.0%--23.5%”
t0“Rapeseed (Brassica napus L.)”
Claim · model-written summary
Dry matter accumulation and nutrient uptake trends were similar among four varieties.
Verbatim
e0“the dry matter accumulation and nutrient uptake trends were similar among the 4 varieties.”
t0“Rapeseed (Brassica napus L.)”
Claim · model-written summary
Nitrogen absorption peaked at seedling stage.
Verbatim
e0“Seedling stage was the maximum stage of nitrogen absorption”
t0“Rapeseed (Brassica napus L.)”
Claim · model-written summary
Dry matter accumulation, phosphorus and potassium absorption were greatest during blooming.
Verbatim
e0“the largest quantity of dry matter accumulation,phosphorus and potassium absorption occurred during blooming.”
t0“Rapeseed (Brassica napus L.)”
Claim · model-written summary
Accumulation rates of dry matter and N, P and K peaked during blooming.
Verbatim
e0“The maximum accumulation rate of dry matter and N,P,K nutrients were all in blooming period.”
t0“Rapeseed (Brassica napus L.)”
Claim · model-written summary
N, P2O5 and K2O requirements per 100 kg of seed were 4.3, 2.7 and 8.7 kg.
Verbatim
e0“The amounts of N,P2O5 and K2O required by double-low rapeseed for producing every 100 kg seeds were 4.3,2.7 and 8.7 kg.”
Claim · model-written summary
HYZ No.9 had the highest seed yield among four varieties under the same fertilizer level.
Verbatim
e0“Under the same fertilizer level,the seed yield of HYZ No.9 with 3 574 kg/hm2 was the highest among the 4 varieties rapeseed.”
Claim · model-written summary
The paper reported an ordering of nutrient efficiency among four varieties.
Not reportedDirection
Verbatim
e0“The order of nutrient efficiency was ZS No.9HYZ No.9HS No.5HS No.4.”
t0“Rapeseed (Brassica napus L.)”