Application of functional magnesium hydroxide meso-element fertilizer in late rice

doi:10.16178/j.issn.0528-9017.20240380

Abstract

Abstract:

This study investigated the effects of applying a functional magnesium hydroxide meso-element fertilizer under conventional nitrogen fertilization and 15% nitrogen reduction on yield traits，agronomic traits，nitrogen uptake，and grain quality of late rice variety Yongyou 1540. The results showed that compared with conventional nitrogen application，the addition of the magnesium hydroxide meso-element fertilizer increased rice yield by raising the number of spikelets per panicle and effective panicles，with the application rate of 10 kg per 667 m2 performing better than 5.0 kg. Even under the 15% nitrogen reduction condition，a relatively high yield level was maintained. In addition，the application of this magnesium fertilizer reduced chalky grain rate and increased gel consistency，thereby improving rice processing and nutritional quality. In summary，it is recommended to apply 5.0-10.0 kg of the functional magnesium hydroxide meso-element fertilizer per 667 m2 on the basis of conventional fertilization with 15% nitrogen reduction，which can both enhance rice yield and improve grain quality. The fertilizer should be applied as a basal dose as early as possible.

Key words: functional magnesium hydroxide meso-element fertilizer, yield, quality, rice, Yongyou 1540

CLC Number:

S511.5

LI Xiaoyan, LU Ruohui, WANG Feng, WU Wangcheng, LIU Ruyang, CAO Xiaochuang. Application of functional magnesium hydroxide meso-element fertilizer in late rice[J]. Journal of Zhejiang Agricultural Sciences, 2026, 67(3): 566-569.

Figures/Tables 5

References 8

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处理	基肥		蘖肥	穗肥	肥料投入总量
处理	复合肥	镁肥	尿素	复合肥	N	P₂O₅	K₂O
T1	30.0	0.0	12.5	20.0	15.75	5.00	7.50
T2	30.0	5.0	12.5	20.0	15.75	5.00	7.50
T3	30.0	10.0	12.5	20.0	15.75	5.00	7.50
T4	25.5	0.0	10.6	17.0	13.48	4.25	6.38
T5	25.5	10.0	10.6	17.0	13.48	4.25	6.38

处理	基肥		蘖肥	穗肥	肥料投入总量
处理	复合肥	镁肥	尿素	复合肥	N	P₂O₅	K₂O
T1	30.0	0.0	12.5	20.0	15.75	5.00	7.50
T2	30.0	5.0	12.5	20.0	15.75	5.00	7.50
T3	30.0	10.0	12.5	20.0	15.75	5.00	7.50
T4	25.5	0.0	10.6	17.0	13.48	4.25	6.38
T5	25.5	10.0	10.6	17.0	13.48	4.25	6.38

处理	667 m²实际产量/kg	667 m²有效穗数/10⁴	每穗颖花数	结实率/%	千粒重/g	667 m²理论产量/kg
T1	477.1	201.1±4.2 b	191.7±5.0 b	83±1 a	23.0±0.4 a	489.8±25.1 c
T2	503.7	204.4±3.3 b	203.6±5.5 a	82±2 a	23.2±0.1 a	530.6±29.4 ab
T3	532.5	212.4±4.3 a	201.6±4.7 a	84±1 a	23.0±0.2 a	549.4±16.6 a
T4	486.8	197.6±3.4 b	195.3±4.2 ab	84±1 a	22.9±0.3 a	494.6±17.0 c
T5	518.9	202.5±2.9 b	204.8±5.7 a	83±3 a	23.0±0.3 a	526.2±12.4 b

处理	667 m²实际产量/kg	667 m²有效穗数/10⁴	每穗颖花数	结实率/%	千粒重/g	667 m²理论产量/kg
T1	477.1	201.1±4.2 b	191.7±5.0 b	83±1 a	23.0±0.4 a	489.8±25.1 c
T2	503.7	204.4±3.3 b	203.6±5.5 a	82±2 a	23.2±0.1 a	530.6±29.4 ab
T3	532.5	212.4±4.3 a	201.6±4.7 a	84±1 a	23.0±0.2 a	549.4±16.6 a
T4	486.8	197.6±3.4 b	195.3±4.2 ab	84±1 a	22.9±0.3 a	494.6±17.0 c
T5	518.9	202.5±2.9 b	204.8±5.7 a	83±3 a	23.0±0.3 a	526.2±12.4 b

时期	处理	株高/cm	叶面积/cm²	根长/cm	叶干重/g	茎干重/g	根干重/g	穗干重/g	总干重/g
分蘖盛期	T1	82.1±0.4 a	2 349.6±80.4 a	18.8±0.4 a	14.0±0.4 b	26.2±2.7 ab	2.1±0.3 c	—	42.4±2.1 ab
	T2	78.2±1.0 bc	2 359.5±112.5 a	21.0±0.9 a	14.3±0.4 b	21.3±0.6 bc	3.1±0.1 a	—	38.7±0.9 b
	T3	74.3±0.4 d	2 010.8±44.0 b	21.5±1.3 a	12.0±0.1 c	18.0±0.9 c	2.4±0.1 bc	—	32.3±0.9 c
	T4	77.3±0.9 c	2 383.9±69.0 a	20.4±1.1 a	14.3±0.3 b	23.4±0.8 bc	2.4±0.3 bc	—	40.1±1.2 b
	T5	80.2±0.5 ab	2 495.3±100.7 a	20.9±0.6 a	16.1±0.2 a	27.4±2.6 a	2.9±0.1 ab	—	46.4±2.4 a
齐穗期	T1	92.9±0.3 a	2 840.9±10.2 b	19.0±0.9 b	17.0±0.1 ab	35.4±0.9 a	3.3±0.2 ab	18.7±0.7 a	74.3±1.7 a
	T2	90.8±0.5 a	2 744.6±69.6 b	21.5±1.5 a	16.8±0.7 ab	33.0±1.6 a	3.1±0.3 b	16.9±1.2 a	69.7±3.3 a
	T3	90.9±0.9 a	2 716.4±36.2 b	21.1±1.5 a	16.3±0.2 b	32.9±1.2 a	2.9±0.2 b	16.8±0.4 a	69.0±1.8 a
	T4	92.4±0.6 a	2 846.0±136.9 b	19.1±0.8 b	17.3±0.7 ab	36.9±1.9 a	3.5±0.1 ab	18.2±1.2 a	75.9±3.7 a
	T5	91.2±2.2 a	3 105.6±64.4 a	19.3±0.4 b	18.2±0.1 a	34.1±0.5 a	3.8±0.1 a	17.9±0.4 a	74.0±0.8 a