Effects on Ammonium Nitrogen and Nitrate Nitrogen in Rhizosphere Soil of Highland Barley Under Different Fertilization Treatments

doi:10.11924/j.issn.1000-6850.casb2021-1063

Abstract

Abstract:

The experiment took the rhizosphere soil of the new highland barley variety ‘Huangqing No.2’ in different growth stages as material, comparatively measured the contents of ammonium nitrogen and nitrate nitrogen in different soil layers under different fertilization treatments and studied the dynamic change rule of ammonium nitrogen and nitrate nitrogen in soil. The results showed that the content of ammonium nitrogen and nitrate nitrogen in the soil demonstrated a trend of ‘decrease, increase and then decrease’ during the whole growth period of highland barley; the content of ammonium nitrogen reached the highest during the heading period and the content of nitrate nitrogen reached the highest during the seedling period, which were 2.75 mg/kg and 22.64 mg/kg, respectively. The contents of ammonium nitrogen and nitrate nitrogen in the 0-20 cm soil layer were 1.76 mg/kg and 11.82 mg/kg, respectively, which were 1.76 and 2.00 times of those in the 20-40 cm soil layer, indicating that the transformation, absorption and transportation of substances were mainly carried out in the upper soil. Meanwhile, it was also shown that when ammonium nitrogen in soil reached a certain concentration, nitrate nitrogen content had no correlation with ammonium nitrogen concentration, but was related with nitrate enzyme activity. The content of ammonium nitrogen and nitrate nitrogen were different under different fertilization treatments, while the effective utilization rates of ammonium nitrogen and nitrate nitrogen were higher in the soil treated by three kinds of slow released fertilizers.

Key words: fertilization treatment, highland barley, ammonium nitrogen, nitrate nitrogen, effect

CLC Number:

ZHOU Lanlan, LIU Meijin, LI Mingjun, XU Dongli, WANG Guoping, GUO Jianwei, HU Zaiqing, ZHANG Zhongguang, LI Fengqing, SANG Anping, ZHANG Tao, XIAO Yunshan, YAN Chunmei. Effects on Ammonium Nitrogen and Nitrate Nitrogen in Rhizosphere Soil of Highland Barley Under Different Fertilization Treatments[J]. Chinese Agricultural Science Bulletin, 2022, 38(30): 85-90.

Figures/Tables 11

References 28

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来源	SS	df	MS	F	Sig.
校正模型	163.692^a	10	16.369	12.662	0.000
截距	339.217	1	339.217	262.388	0.000
生育期	129.576	4	32.394	25.057	0.000
土层深度	25.755	1	25.755	19.922	0.000
施肥处理	8.547	5	1.709	1.322	0.036
误差	217.192	168	1.293
总计	722.379	179
矫正的总计	380.884	178

来源	SS	df	MS	F	Sig.
校正模型	163.692^a	10	16.369	12.662	0.000
截距	339.217	1	339.217	262.388	0.000
生育期	129.576	4	32.394	25.057	0.000
土层深度	25.755	1	25.755	19.922	0.000
施肥处理	8.547	5	1.709	1.322	0.036
误差	217.192	168	1.293
总计	722.379	179
矫正的总计	380.884	178

生育时期	铵态氮平均值/ (mg/kg)	差异显著性
生育时期	铵态氮平均值/ (mg/kg)	0.05	0.01
抽穗期	2.75	a	A
成熟期	1.90	b	B
苗期	1.02	c	C
拔节期	0.87	cd	C
分蘖期	0.35	d	C

生育时期	铵态氮平均值/ (mg/kg)	差异显著性
生育时期	铵态氮平均值/ (mg/kg)	0.05	0.01
抽穗期	2.75	a	A
成熟期	1.90	b	B
苗期	1.02	c	C
拔节期	0.87	cd	C
分蘖期	0.35	d	C

土层深度/ cm	铵态氮平均值/ (mg/kg)	差异显著性
土层深度/ cm	铵态氮平均值/ (mg/kg)	0.05	0.01
0~20	1.76	a	A
20~40	1.00	b	B