Slow-release Urea Combined with Fulvic Acid: Effects on Accumulation, Distribution and Transport of Dry Matter in Black Highland Barley

doi:10.11924/j.issn.1000-6850.casb2022-0430

Abstract

Abstract:

In order to clarify the effects of combined application of different urea fertilizers with fulvic acid on dry matter, yield and nitrogen fertilizer utilization of black highland barley, taking Longzi black highland barley as the experimental material, we conducted random block experiments to compare and analyze the effects of different fertilization schemes on dry matter accumulation, distribution and transport, and yield of black highland barley. The results are as follows. (1) Compared with conventional urea treatment, slow-release urea treatment increased dry matter accumulation in leaf, stem sheath and ear by 10.50%, 9.11% and 10.91% on average at flowering stage and mature stage. And the slow-release urea combined with fulvic acid treatment could further increase the dry matter accumulation in each part of black highland barley. (2) Slow-release urea and fulvic acid reduced the transfer volume and transfer rate of dry matter in the vegetative organs of black highland barley before flowering, improved the distribution rate of dry matter in leaves at flowering stage, and then increased the accumulation and contribution rate of photosynthetic assimilates in black highland barley after flowering. (3) Compared with conventional urea treatment, slow-release urea treatment significantly increased grain yield, nitrogen fertilizer agronomic efficiency, partial productivity and contribution rate by 13.80%, 44.13%, 13.80% and 26.66%, respectively. Compared with slow-release urea treatment, slow-release urea with fulvic acid treatment could increase grain yield, nitrogen fertilizer agronomic efficiency, partial productivity and contribution rate by 21.66%, 54.69%, 21.64% and 27.31%, respectively. The application of slow-release urea with fulvic acid could significantly improve the dry matter accumulation, yield and nitrogen utilization rate of black highland barley, and these indexes showed a decreasing trend after nitrogen fertilizer reduction by 20%. Therefore, the combined application of 135 kg/hm² slow-release urea with fulvic acid is the best fertilization scheme for black highland barley.

Key words: slow-release urea, fulvic acid, black highland barley, dry matter, yield

DONG Qiang, ZHU Dingying, ZHOU Xin, XU Minglong, ZHANG Yi, WANG Jianlin. Slow-release Urea Combined with Fulvic Acid: Effects on Accumulation, Distribution and Transport of Dry Matter in Black Highland Barley[J]. Chinese Agricultural Science Bulletin, 2023, 39(11): 57-63.

Figures/Tables 5

References 25

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处理编号	配施比例	氮肥用量/(kg/hm²)	黄腐酸用量/(kg/hm²)
CK	不施尿素	0	0
N	100%常规施氮处理	135	0
N80%	80%常规施肥	108	0
CN	100%缓释尿素	135	0
CN80%	80%缓释尿素	108	0
N+FA	100%常规施肥配施黄腐酸	135	45
N80%+FA	80%常规施肥减配施黄腐酸	108	45
CN+FA	100%缓释尿素配施黄腐酸	135	45
CN80%+FA	80%缓释尿素配施黄腐酸	108	45

处理编号	配施比例	氮肥用量/(kg/hm²)	黄腐酸用量/(kg/hm²)
CK	不施尿素	0	0
N	100%常规施氮处理	135	0
N80%	80%常规施肥	108	0
CN	100%缓释尿素	135	0
CN80%	80%缓释尿素	108	0
N+FA	100%常规施肥配施黄腐酸	135	45
N80%+FA	80%常规施肥减配施黄腐酸	108	45
CN+FA	100%缓释尿素配施黄腐酸	135	45
CN80%+FA	80%缓释尿素配施黄腐酸	108	45

处理	积累量/（mg/茎）			分配率/%
处理	叶片	茎秆+鞘	穗	叶片	茎秆+鞘	穗
CK	278.17±11.00f	979.50±33.54e	409.94±15.68e	16.69±0.68d	58.74±0.96a	24.58±0.37bc
N	338.17±4.19d	1069.33±36.99d	510.50±26.06bcd	17.64±0.35c	55.75±1.03b	26.62±1.17ab
N80%	316.33±9.44e	992.17±39.27e	476.17±18.51d	17.72±0.37c	55.58±1.52b	26.69±1.28ab
CN	382.50±5.27c	1136.00±29.93c	567.17±5.84ab	18.34±0.30bc	54.46±0.82b	27.20±0.54a
CN80%	370.33±18.04c	1029.83±19.33de	489.29±50.57cd	19.60±0.12a	54.55±1.63b	25.85±1.53abc
N+FA	401.17±5.58b	1240.17±38.62b	545.83±35.62bc	18.35±0.61bc	56.71±0.54ab	24.94±0.82abc
N80%+FA	386.50±12.49bc	1263.00±32.31ab	511.50±55.24bcd	17.88±0.36c	58.47±2.21a	23.65±2.27c
CN+FA	431.33±12.85a	1312.17±25.40a	618.83±69.79a	18.27±0.84bc	55.56±1.69b	26.17±2.51ab
CN80%+FA	420.00±8.85a	1242.67±33.50b	536.17±14.58bcd	19.10±0.42ab	56.51±0.90ab	24.39±0.88bc

处理	积累量/（mg/茎）			分配率/%
处理	叶片	茎秆+鞘	穗	叶片	茎秆+鞘	穗
CK	278.17±11.00f	979.50±33.54e	409.94±15.68e	16.69±0.68d	58.74±0.96a	24.58±0.37bc
N	338.17±4.19d	1069.33±36.99d	510.50±26.06bcd	17.64±0.35c	55.75±1.03b	26.62±1.17ab
N80%	316.33±9.44e	992.17±39.27e	476.17±18.51d	17.72±0.37c	55.58±1.52b	26.69±1.28ab
CN	382.50±5.27c	1136.00±29.93c	567.17±5.84ab	18.34±0.30bc	54.46±0.82b	27.20±0.54a
CN80%	370.33±18.04c	1029.83±19.33de	489.29±50.57cd	19.60±0.12a	54.55±1.63b	25.85±1.53abc
N+FA	401.17±5.58b	1240.17±38.62b	545.83±35.62bc	18.35±0.61bc	56.71±0.54ab	24.94±0.82abc
N80%+FA	386.50±12.49bc	1263.00±32.31ab	511.50±55.24bcd	17.88±0.36c	58.47±2.21a	23.65±2.27c
CN+FA	431.33±12.85a	1312.17±25.40a	618.83±69.79a	18.27±0.84bc	55.56±1.69b	26.17±2.51ab
CN80%+FA	420.00±8.85a	1242.67±33.50b	536.17±14.58bcd	19.10±0.42ab	56.51±0.90ab	24.39±0.88bc

处理	积累量/(mg/茎)				分配率/%
处理	叶片	茎秆+鞘	穗轴+颖壳	籽粒	叶片	茎秆+鞘	穗轴+颖壳	籽粒
CK	78.83±1.15f	787.33±15.31f	257.33±11.51g	1270.83±15.22g	3.29±0.02d	32.88±0.49a	10.75±0.38d	53.08±0.77d
N	120.33±7.97de	931.17±27.08d	377.33±7.57ef	1910.00±80.15e	3.61±0.31cd	27.89±0.70b	11.30±0.21bcd	57.19±0.96b
N80%	107.17±1.76e	850.33±4.80e	342.17±22.06f	1753.17±21.13f	3.51±0.09d	27.86±0.35b	11.20±0.58cd	57.43±0.33ab
CN	129.83±6.05d	1042.83±17.56c	449.83±5.03bc	2082.50±53.19d	3.50±0.13d	28.15±0.47b	12.14±0.28ab	56.20±0.60bc
CN80%	134.50±13.31d	886.83±21.07de	396.70±35.54de	2030.17±65.68d	3.89±0.25bc	25.73±0.43c	11.50±0.76bcd	58.88±0.50a
N+FA	171.00±6.76bc	1133.33±39.75b	432.50±30.51cd	2286.00±33.51b	4.25±0.10ab	28.17±0.58b	10.75±0.65d	56.84±1.25bc
N80%+FA	159.33±5.62c	1095.67±51.50b	435.67±28.87c	2203.50±30.38c	4.09±0.12ab	28.13±1.13b	11.19±0.73cd	56.59±1.19bc
CN+FA	186.67±12.25a	1223.83±31.25a	556.50±20.54a	2453.83±39.61a	4.22±0.27ab	27.68±0.62b	12.59±0.44a	55.51±1.07c
CN80%+FA	174.67±13.14ab	1118.17±8.10b	474.17±11.79b	2286.67±47.23b	4.31±0.35a	27.59±0.46b	11.70±0.17bc	56.41±0.63bc