Humic Acid Added in Urea Improves Yield and Nitrogen Uptake of Winter Wheat

doi:10.11924/j.issn.1000-6850.casb18120088

Abstract

Abstract:

The objectives are to verify the effect of humic acid addition on urea fertilizer efficiency, and to provide evidences to increase yield of winter wheat by humic acid-urea in limy soils in the North China Plain. Compared with common urea application, the effect of different humic acid-urea (type I-VI, with 1%-6% humic acid concentration) on nitrogen uptake and yield increase of winter wheat was studied in field. The results showed that humic acid-urea addition amounts were closely correlated with winter wheat yield and nitrogen uptake. With the same nitrogen application amount, IV type humic acid-urea significantly increased yield of winter wheat and promoted nitrogen transferring to wheat grain. Meanwhile, humic acid-urea improved yield component, including number of grains per ear (type I and II humic acid-urea) and 1000-grain weight (type II, V and VI humic acid-urea). Type III humic acid-urea significantly enhanced nitrogen uptake efficiency, but there was not significant promotion for manganese uptake, soil organic matter content, emergence number, tiller number, head-producing tiller number and ear number. Therefore, fertilizer effect of humic acid-urea was closely correlated with humic acid application amounts. 4% humic acid application in urea could significantly improve yield and the components of winter wheat yield, and 3% humic acid application could significantly enhance nitrogen uptake efficiency.

Key words: humic acid-urea, winter wheat, yield, nitrogen uptake efficiency

CLC Number:

S143.1+6

Liu Shenglin, Dong Xiaoxia, Sun Zeqiang, Cui Shuangshuang. Humic Acid Added in Urea Improves Yield and Nitrogen Uptake of Winter Wheat[J]. Chinese Agricultural Science Bulletin, 2020, 36(14): 16-21.

Figures/Tables 7

References 21

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处理	有效穗数/(×10⁶/hm²)	穗粒数	千粒重/g
N0	0.52±0.02a	23.51±0.91ab	45.02±1.43b
CU	0.51±0.04a	24.81±1.30ab	47.20±0.32ab
HU1	0.48±0.02a	28.18±2.59a	46.99±1.23ab
HU2	0.50±0.04a	27.97±1.98a	48.06±0.40a
HU3	0.54±0.03a	22.69±0.75b	47.34±0.10ab
HU4	0.57±0.02a	24.88±1.59ab	46.40±0.23ab
HU5	0.55±0.01a	25.71±0.27ab	47.67±0.21a
HU6	0.57±0.09a	26.47±1.71ab	48.30±0.77a

处理	有效穗数/(×10⁶/hm²)	穗粒数	千粒重/g
N0	0.52±0.02a	23.51±0.91ab	45.02±1.43b
CU	0.51±0.04a	24.81±1.30ab	47.20±0.32ab
HU1	0.48±0.02a	28.18±2.59a	46.99±1.23ab
HU2	0.50±0.04a	27.97±1.98a	48.06±0.40a
HU3	0.54±0.03a	22.69±0.75b	47.34±0.10ab
HU4	0.57±0.02a	24.88±1.59ab	46.40±0.23ab
HU5	0.55±0.01a	25.71±0.27ab	47.67±0.21a
HU6	0.57±0.09a	26.47±1.71ab	48.30±0.77a

处理	出苗数	分蘖数	有效分蘖
N0	234.8±9.8a	0.13±0.03a	462.7±34.8b
CU	226.3±7.5a	0.13±0.03a	614.7±43.7a
HU1	215.3±11.9a	0.17±0.03a	632.0±3.5a
HU2	218.9±10.4a	0.13±0.03a	591.0±60.1a
HU3	211.8±3.3a	0.13±0.03a	581.6±49.3a
HU4	234.8±9.9a	0.13±0.03a	558.2±43.9a
HU5	214.7±6.3a	0.13±0.03a	640.2±19.3a
HU6	208.2±7.1a	0.17±0.03a	575.7±36.0a

处理	出苗数	分蘖数	有效分蘖
N0	234.8±9.8a	0.13±0.03a	462.7±34.8b
CU	226.3±7.5a	0.13±0.03a	614.7±43.7a
HU1	215.3±11.9a	0.17±0.03a	632.0±3.5a
HU2	218.9±10.4a	0.13±0.03a	591.0±60.1a
HU3	211.8±3.3a	0.13±0.03a	581.6±49.3a
HU4	234.8±9.9a	0.13±0.03a	558.2±43.9a
HU5	214.7±6.3a	0.13±0.03a	640.2±19.3a
HU6	208.2±7.1a	0.17±0.03a	575.7±36.0a

处理	有机质/(g/kg)	碱解氮/(g/kg)
N0	13.97±0.27a	68.10±5.27a
CU	12.50±0.94ab	61.86±9.85ab
HU1	12.38±0.74ab	68.61±16.06a
HU2	11.30±0.65b	62.01±9.22ab
HU3	12.41±0.46ab	62.60±6.36ab
HU4	12.27±0.79ab	49.53±8.41b
HU5	12.33±0.27ab	55.99±11.48ab
HU6	10.84±1.02b	52.40±6.40b