Yield, Nitrogen and Phosphorus Nutrient Effects of Alginate Compound Fertilizer on Double-cropping Rice

doi:10.3969/j.issn.1000-2561.2020.05.003

Abstract

Abstract:

A field experiment of double-cropping rice in south China was investigated. Five treatments were designed as follows: 1) no fertilization (CK); 2) conventional compound fertilizer (CCF); 3) alginate compound fertilizer (ACF); 4) 80% conventional compound fertilizer (80% CCF); 5) 80% alginate compound fertilizer (80% ACF). The effects of reduction application of alginate compound fertilizer on yield, nutrient uptake by rice and residue in soil as well as soil bioactivity of double-cropping rice were studied. Alginate compound fertilizer could increase the rice effective panicle and grain yield. The effective panicle of ACF treatment increased significantly by 14.5% (late rice), grain yield increased significantly by 7.6% (early rice) and 5.1% (late rice) compared to CCF. There was no significant difference of grain yield between 80% ACF and CCF treatment. Alginate compound fertilizer could improve the partial factor productivity of nitrogen and phosphorus fertilizer. Under reduced fertilization condition, the partial factor productivity of nitrogen and phosphorus fertilizer increased by 6.1-8.5 and 15.2-21.4 kg/kg, respectively, nitrogen and phosphorus uptake efficiency increased by 11.3-19.7 and 12.0-19.8 percentage points, respectively, and 80% ACF showed the highest value. Reduced fertilization significantly decreased the content of NO₃ ^--N in the 20-40 cm soil layer. Alginate compound fertilizer could increase soil microbial biomass carbon (nitrogen) and soil sucrase, urease and acid phosphatase activities compared to the conventional compound fertilizer. Principal component analysis showed that the comprehensive score of soil fertility was 80% ACF>ACF>CCF>80% CCF>CK. This study showed that 80% ACF treatment could maintain rice yield compared with CCF under double-cropping rice in south China. However, the balance of nitrogen and phosphorus in soil was deficient after one year of double cropping rice planted. It is suggested that reducing fertilization measures should be formulated according to the soil fertility status and target yield in order to maintain the sustainability of soil fertility.

Key words: double-cropping rice, compound fertilizer containing alginate acid, fertilizer efficiency, yield, microbial biomass carbon (nitrogen), soil enzyme activity

CLC Number:

S143

HUANG Jichuan,PENG Zhiping,TU Yuting,WU Xuena,LIANG Zhixiong,YANG Linxiang,LIN Zhijun. Yield, Nitrogen and Phosphorus Nutrient Effects of Alginate Compound Fertilizer on Double-cropping Rice[J]. Chinese Journal of Tropical Crops, 2020, 41(5): 859-867.

Figures/Tables 9

References 33

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	处理 Treatment	有效穗 Effective panicles	结实率 Setting rate/%	穗实粒 Filled grains per panicle	千粒重 1000-grain weight/g
早稻	CK	12.0^c	78.4^a	126.6^b	20.5^a
	普通复合肥	13.9^ab	74.6^a	143.3^a	20.4^a
	海藻复合肥	14.5^a	72.8^a	148.6^a	20.6^a
	80%普通复合肥	13.4^b	72.5^a	137.9^ab	20.5^a
	80%海藻复合肥	13.3^b	72.0^a	138.2^ab	21.1^a
晚稻	CK	9.5^c	78.9^a	119.3^c	18.8^a
	普通复合肥	12.4^b	72.7^b	129.6^ab	17.9^a
	海藻复合肥	14.2^a	69.7^b	133.3^a	18.8^a
	80%普通复合肥	12.3^b	71.1^b	125.7^abc	18.4^a
	80%海藻复合肥	13.6^ab	70.0^b	124.1^bc	18.1^a

	处理 Treatment	有效穗 Effective panicles	结实率 Setting rate/%	穗实粒 Filled grains per panicle	千粒重 1000-grain weight/g
早稻	CK	12.0^c	78.4^a	126.6^b	20.5^a
	普通复合肥	13.9^ab	74.6^a	143.3^a	20.4^a
	海藻复合肥	14.5^a	72.8^a	148.6^a	20.6^a
	80%普通复合肥	13.4^b	72.5^a	137.9^ab	20.5^a
	80%海藻复合肥	13.3^b	72.0^a	138.2^ab	21.1^a
晚稻	CK	9.5^c	78.9^a	119.3^c	18.8^a
	普通复合肥	12.4^b	72.7^b	129.6^ab	17.9^a
	海藻复合肥	14.2^a	69.7^b	133.3^a	18.8^a
	80%普通复合肥	12.3^b	71.1^b	125.7^abc	18.4^a
	80%海藻复合肥	13.6^ab	70.0^b	124.1^bc	18.1^a

处理 Treatment	早稻 Early rice/(kg·hm^-2)		晚稻 Late rice/(kg·hm^-2)		两季合计 Total of double season/(kg·hm^-2)
处理 Treatment	稻谷产量 Grain yield	秸秆产量 Straw yield	稻谷产量 Grain yield	秸秆产量 Straw yield	稻谷产量 Grain yield	秸秆产量 Straw yield
CK	4 970.8^c	5 049.8^c	4 166.9^d	3 932.9^c	9 137.7^c	8 982.7^c
普通复合肥	6 614.3^b	6 894.8^ab	5 044.7^b	5 158.3^a	11 659.0^b	12 053.1^ab
海藻复合肥	7 115.0^a	7 123.5^a	5 302.1^a	5 414.9^a	12 417.1^a	12 538.4^a
80%普通复合肥	6 315.3^b	6 586.5^b	4 765.7^c	4 806.2^b	11 081.0^b	11 392.7^b
80%海藻复合肥	6 540.3^b	6 714.5^b	4 992.7^b	5 142.2^a	11 533.0^b	11 856.7^ab

处理 Treatment	早稻 Early rice/(kg·hm^-2)		晚稻 Late rice/(kg·hm^-2)		两季合计 Total of double season/(kg·hm^-2)
处理 Treatment	稻谷产量 Grain yield	秸秆产量 Straw yield	稻谷产量 Grain yield	秸秆产量 Straw yield	稻谷产量 Grain yield	秸秆产量 Straw yield
CK	4 970.8^c	5 049.8^c	4 166.9^d	3 932.9^c	9 137.7^c	8 982.7^c
普通复合肥	6 614.3^b	6 894.8^ab	5 044.7^b	5 158.3^a	11 659.0^b	12 053.1^ab
海藻复合肥	7 115.0^a	7 123.5^a	5 302.1^a	5 414.9^a	12 417.1^a	12 538.4^a
80%普通复合肥	6 315.3^b	6 586.5^b	4 765.7^c	4 806.2^b	11 081.0^b	11 392.7^b
80%海藻复合肥	6 540.3^b	6 714.5^b	4 992.7^b	5 142.2^a	11 533.0^b	11 856.7^ab

项目 Item	处理 Treatment	氮素N/(kg·hm^-2)		磷素P₂O₅/(kg·hm^-2)
项目 Item	处理 Treatment	养分吸收 N accumulation	氮素盈余 N surplus	养分吸收 P accumulation	磷素盈余 P surplus
早稻	CK	96.8^c	-96.8^c	51.0^c	-51.0^c
	普通复合肥	148.5^ab	1.5^a	68.6^ab	-8.6^a
	海藻复合肥	154.7^a	-4.7^a	70.3^a	-10.3^a
	80%普通复合肥	139.8^b	-19.8^b	64.3^b	-16.3^b
	80%海藻复合肥	147.4^ab	-27.4^b	64.8^ab	-16.8^b
晚稻	CK	81.6^c	-81.6^c	35.8^c	-35.8^d
	普通复合肥	110.7^ab	39.3^a	44.8^a	15.2^a
	海藻复合肥	119.3^a	30.7^a	47.4^a	12.6^a
	80%普通复合肥	102.5^b	17.5^b	41.6^b	6.4^b
	80%海藻复合肥	109.0^ab	11.0^b	45.3^a	2.7^c
两季合计	CK	178.4^c	-178.4^c	86.7^d	-86.8^c
	普通复合肥	259.2^ab	40.8^a	113.4^ab	6.6^a
	海藻复合肥	274.0^a	26.0^a	117.7^a	2.3^a
	80%普通复合肥	242.3^b	-2.3^b	105.9^c	-9.9^b
	80%海藻复合肥	256.4^ab	-16.4^b	110.1^bc	-14.1^b