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- W2357629058 abstract "With castor-oil plant Zibi 3(Ricinus communis L.) as the test cultivar,the effects of nitrogen application amount(0,150,270 and 390 kg·hm-2) on the accumulation and distribution of dry matter,yield and yield component were studied under the planting density of 12 000 plants per hectare.The results indicated that the accumulation rates of all organs including leaf,stem and root were generally low before anthesis,but after anthesis the accumulation rates increased rapidly.The application of nitrogen had clearly affected the accumulation of dry matter of root,stem,inflorescence as well as the whole plant.When nitrogen application amount was 150 kg·hm-2,the accumulation rate of the dry weight of inflorescence during the growth stages of anthesis and grain-filling was the highest,indicating that the nutrients stored in the stem and the leaves were more readily transported into inflorescences.When the nitrogen amount was 270 and 390 kg·hm-2,the accumulation rates of leaves and roots at flowering stage and grain filling stage were unreasonably high,whereas the accumulation rates of inflorescence during the stages of anthesis and grain-filling were very low,resulting in low accumulation of dry matter in inflorescences.In this experiment,the number of seed grain per plant increased under the nitrogen treatments of 150 and 270 kg·hm-2.When nitrogen amount increased to 390 kg·hm-2,the number of seed grain per plant decreased compared with the treatment of 270 kg·hm-2.Nitrogen amount of 150 kg·hm-2 produced the highest one-hundred-grain weight.Although the one-hundred-grain weight at 270 kg·hm-2 and 390 kg·hm-2 were also higher than the control,the increasing effect reduced gradually.In this experiment,the highest yield was 6 291.69 kg·hm-2 when the nitrogen amount was 150 kg·hm-2.The yields of the treatments of 270 kg·hm-2 and 390 kg·hm-2 were 6 243.03 kg·hm-2 and 5 179.05 kg·hm-2,ranking the second and the third of the four treatments." @default.
- W2357629058 created "2016-06-24" @default.
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- W2357629058 date "2009-01-01" @default.
- W2357629058 modified "2023-09-26" @default.
- W2357629058 title "Impact of nitrogen application amount on dry matter accumulation,yield and yield components in castor-oil plant" @default.
- W2357629058 hasPublicationYear "2009" @default.
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