Effects of decomposed sheep manure combined with chemical fertilizer on the soil fertility and yield of highland barley fields

doi:10.3969/j.issn.1000-5641.2025.04.008

Abstract

Abstract:

To study the effects of the combined application of decomposed sheep manure organic fertilizer and chemical fertilizer on the soil fertility and yield of highland barley fields (currently treated with conventional fertilization for highland barley planting in the Lhasa agricultural area), four different treatments were prepared for the field experiment by increasing the application of potassium chloride and decomposed sheep manure, and reducing the amount of urea and diammonium phosphate (DAP). The treatments follow: T1 conventional fertilization (sheep manure 5250 kg/hm²+ urea 180 kg/hm² + DAP 180 kg/hm²), T2 (sheep manure 5250 kg/hm² + urea 150 kg/hm²+ DAP 120 kg/hm² + potassium chloride 30 kg/hm²), T3 (sheep manure 10500 kg/hm² + urea 150 kg/hm² + DAP 120 kg/hm² + potassium chloride 30 kg/hm²), and T4 (sheep manure 15750 kg/hm² + urea 135 kg/hm² + DAP 75 kg/hm² + potassium chloride 30 kg/hm²). The results showed that soil organic matter, total nitrogen, and total potassium decreased after harvesting compared with the situation before planting according to different fertilization modes. The available nitrogen, phosphorus, potassium, and pH of T3 increased slightly after harvesting compared with their levels before planting. Total and available phosphorus in T1 also increased after harvesting compared with their levels before planting. The height and biomass of highland barley were higher in the mature stage after applications of T1 and T4 treatments. With an increase in the proportion of decomposed sheep manure instead of chemical fertilizer, the yield of highland barley initially increased and then decreased. When the fertilizer substitution rate for T3 reached 16.67%, the yield of highland barley reached 5323.65 kg/hm². Study findings indicate that the combined application of decomposed sheep manure and chemical fertilizer is beneficial for improving the fertilizer supply capacity of soil and increasing the yield of highland barley. This study provides a reference for rational fertilization and the reduction of non-point source pollution in highland barley fields in Tibet.

Key words: decomposed sheep manure organic fertilizer, highland barley, soil fertility, yield

CLC Number:

S512.3

Guoying SONG, Zhuoma BIANBA, Guoyi LIU. Effects of decomposed sheep manure combined with chemical fertilizer on the soil fertility and yield of highland barley fields[J]. J* E* C* N* U* N* S*, 2025, 2025(4): 77-83.

Figures/Tables 4

Table 1

Fig.1

Table 2

Table 3

References 38

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施肥处理	羊粪用量	尿素用量			磷酸二铵用量	氯化钾用量
施肥处理	基施	基施	分蘖期追施	拔节期追施	基施	基施
T1	5250	60	60.0	60.0	180	0
T2	5250	45	52.5	52.5	120	30
T3	10500	30	60.0	60.0	120	30
T4	15750	30	52.5	52.5	75	30

施肥处理	株高/cm						生物产量/ (t/hm²)
施肥处理	三叶一心	分蘖期	拔节期	抽穗期	灌浆期	成熟期	生物产量/ (t/hm²)
T1	13.53 ± 0.13^a	18.70 ± 0.45^a	51.12 ± 0.72^a	79.30 ± 0.10^a	91.21 ± 0.61^a	92.3 ± 0.58^a	28.4 ± 3.0^a
T2	13.12 ± 1.93^a	19.01 ± 1.16^a	48.54 ± 1.54^b	71.72 ± 1.26^b	84.9 ± 1.55^c	89.7 ± 0.66^b	24.2 ± 3.3^a
T3	12.27 ± 0.30^a	18.75 ± 1.31^a	47.59 ± 0.69^b	71.42 ± 0.96^b	85.53 ± 0.93^bc	90.07 ± 0.45^b	24.7 ± 1.8^a
T4	13.06 ± 0.65^a	18.71 ± 1.20^a	49.88 ± 0.50^ab	68.6 ± 0.78^c	88.23 ± 0.81^b	91.07 ± 0.40^ab	25.8 ± 4.3^a

施肥处理	穗粒数/(粒/株)	有效成穗数/(10⁴株/hm²)	千粒重/g	籽粒产量/(kg/hm²)	较T2增产情况/%
T1	44.35 ± 0.48^b	304.65 ± 7.65^a	37.46 ± 0.16^c	5034.30 ± 270.30^a	7.91
T2	43.24 ± 0.15^c	304.65 ± 7.65^a	36.78 ± 0.33^b	4665.15 ± 113.55^b	0
T3	45.00 ± 0.20^a	304.65 ± 7.65^a	38.24 ± 0.33^a	5323.65 ± 70.50^a	14.11
T4	44.62 ± 0.16^ab	304.65 ± 7.65^a	38.09 ± 0.31^a	5177.85 ± 153.15^a	10.99

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