Effects of Fertilizer Reduction Combined with Bio-organic Fertilizer on Soil Characteristics and Oat Yield

doi:10.11924/j.issn.1000-6850.casb2020-0231

Abstract

Abstract:

To solve the problem of excessive fertilizer application in oat production, the effects of diammonium phosphate (DAP) reduction combined with bio-organic fertilizer on soil properties and oat yield were studied. We set 5 treatments of reducing 50% DAP (50D), reducing 25% DAP (75D), and 100% DAP (CK), reducing 50% DAP + bio-organic fertilizer (50DM), reducing 25% DAP + bio-organic fertilizer (75DM), to analyze the three kinds of soil enzyme activities, soil nutrient content and oat yield. The results showed that the activities of sucrase, urease and catalase in 0-20 cm soil were significantly increased under the treatment of 75DM at the flowering and harvesting stages, compared with CK, increased by 7.6%, 12.6% and 25.2% at harvest stage, respectively. Compared with CK, fertilizer combined with bio-organic fertilizer effectively increased the content of soil alkaline hydrolyzed nitrogen at the harvest stage by 9.8%-22.9%, and 75DM treatment was the optimal. The effective panicle number, grain number per panicle and 1000-grain weight of oat were significantly increased under the treatments of chemical fertilizer combined with bio-organic fertilizer. The grain yield was the highest under 75DM treatment, which was 24.5% and 9.3% higher than that of 75D and CK, respectively. Correlation analysis showed that soil enzyme activity, soil nutrient and oat yield were significantly and positively correlated. Under the field condition, reducing 25% chemical fertilizer in combination with 600 kg/hm² bio-organic fertilizer could improve soil fertility and enzyme activity, and it is conducive to oat yield increase.

Key words: fertilizer reduction, bio-organic fertilizer, oat, soil enzyme activity, available soil nutrients, yield

CLC Number:

S365

Kang Yongjian, Zhao Baoping, Sun Wen, Liu Ruifang, Liu Jinghui. Effects of Fertilizer Reduction Combined with Bio-organic Fertilizer on Soil Characteristics and Oat Yield[J]. Chinese Agricultural Science Bulletin, 2021, 37(11): 59-64.

Figures/Tables 10

References 29

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处理	处理代码	磷酸二铵	生物有机肥
减施50%化肥	50D	75	—
减施25%化肥	75D	112.5	—
减施50%化肥+生物有机肥	50DM	75	600
减施25%化肥+生物有机肥	75DM	112.5	600
100%化肥	CK	150	—

处理	处理代码	磷酸二铵	生物有机肥
减施50%化肥	50D	75	—
减施25%化肥	75D	112.5	—
减施50%化肥+生物有机肥	50DM	75	600
减施25%化肥+生物有机肥	75DM	112.5	600
100%化肥	CK	150	—

处理	穗数/(穗/m²)	穗粒数/粒	穗长/cm	千粒重/g	产量/(g/m²)
50D	120.0 d	70.2 d	19.4 c	21.4 b	168.3 d
75D	136.0 c	77.6 c	20.9 b	21.1 b	215.1 bc
50DM	132.0 c	81.0 b	22.0 b	23.8 b	194.6 c
75DM	168.0 b	88.4 a	25.8 a	28.0 a	268.0 a
CK	184.0 a	87.0 a	22.9 ab	27.4 a	245.2 b

处理	穗数/(穗/m²)	穗粒数/粒	穗长/cm	千粒重/g	产量/(g/m²)
50D	120.0 d	70.2 d	19.4 c	21.4 b	168.3 d
75D	136.0 c	77.6 c	20.9 b	21.1 b	215.1 bc
50DM	132.0 c	81.0 b	22.0 b	23.8 b	194.6 c
75DM	168.0 b	88.4 a	25.8 a	28.0 a	268.0 a
CK	184.0 a	87.0 a	22.9 ab	27.4 a	245.2 b

	过氧化氢酶	蔗糖酶	脲酶	碱解氮	速效磷	速效钾	产量
过氧化氢酶	1
蔗糖酶	0.525^**	1
脲酶	0.591^**	0.533^**	1
碱解氮	0.301	0.125	0.097	1
速效磷	0.284	0.101	0.155	0.232	1
速效钾	0.328^*	0.349^*	0.344	0.534^**	0.434^**	1
产量	0.354^*	0.273	0.249	0.653^**	0.366^*	0.566^**	1