Crops ›› 2017, Vol. 33 ›› Issue (6): 126-130.doi: 10.16035/j.issn.1001-7283.2017.06.021

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Effects of Differrent Nitrogen Level on Material Production and Nitrogen Use Characteristics in Glutinous Sorghum

Gao Jie,Li Qingfeng,Wang Can,Zhang Guobing,Peng Qiu   

  1. Guizhou Institute of Upland Crops,Guiyang 550006,Guizhou,China
  • Received:2017-07-06 Revised:2017-09-04 Online:2017-12-15 Published:2018-08-26
  • Contact: Qiu Peng

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Abstract:

The glutinous sorghum cultivar Qiangao 8 was used as research object and the material production and nitrogen utilization characteristics were studied under different nitrogen levels. The results showed that the yield, dry matter accumulation and total nitrogen accumulation presented the trend of increasing first and then decreasing with the increase of nitrogen level. Compared with no nitrogen application treatment, the yield, dry matter accumulation and total nitrogen accumulation of glutinous sorghum significantly increased with nitrogen application, the treatment of N150 was the largest increase; Compared high nitrogen treatment N300 and N450 with N150, the dry matter production efficiency, nitrogen harvest index, nitrogen apparent recovery rate, nitrogen agronomic efficiency, nitrogen fertilizer agronomic efficiency, nitrogen use efficiency and nitrogen partial factor productivity had different degrees of reduction, showing that the nitrogen use efficiency was low and the nitrogen fertilizer lose more under high nitrogen level. Comprehensive consideration, the suitable application rate of nitrogen fertilizer was a little higher than 150kgN/hm 2 in glutinous sorghum in Guiyang area of Guizhou Province.

Key words: Glutinous sorghum, Nitrogen level, Nitrogen use characteristics, Material production

Fig.1

Effects of different nitrogen levels on yield, TDMA and TNA of waxy sorghum Different letters mean significant differences at P=0.05"

Table 1

Effects of different nitrogen levels on nitrogen utilization parameters of waxy sorghum"

处理
Treatment		 氮素收获指数
NHI (%)		 干物质生产效率
DMPE (kg/kg DW)		 氮素表观回收率
NARR (%)		 氮素农艺效率
NAE (kg/kg DM)		 氮肥农学利用率
NFAE (kg/kg)		 氮肥利用率
NUE (%)		 氮肥偏生产力
NPFP (kg/kg)
N0 67.09a / / / / / /
N150 60.63b 134.86a 158.10a 34.67a 12.11a 31.36a 43.50a
N300 59.29bc 60.51b 67.71b 10.42ab 4.88ab 4.34b 20.58b
N450 54.32c 38.12c 47.06c 4.73b 3.03b 4.81b 13.50c
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