Interaction Between Fish Culture and Nitrogen Application: Effects on Soil Fertility, Rice Yield and Nutrient Accumulation in Paddy Fields

doi:10.11924/j.issn.1000-6850.casb19020026

Abstract

Abstract:

The paper aims to provide a scientific basis for fertilization management of fish culture in paddy fields. Taking a new hybrid rice variety ‘Nei6You106’ as material, we studied the coupling effects of fish-nitrogen-density on soil fertility, rice yield and nutrient uptake and accumulation in paddy fields under 3 fish-nitrogen treatments (CK: no fish + no nitrogen application, F: fish + no nitrogen application, FN: fish + 150 kg/hm ² nitrogen application) and 4 seedling densities. The results showed that: the organic matters significantly increased, nitrogen maintained balance, phosphorus and potassium decreased significantly after fish culture in paddy fields; the overall trends of rice yield, over ground dry matter and accumulation of nitrogen, phosphorus and potassium under fish-nitrogen treatments were FN>F>CK, FN and F significantly increased rice yield by 22.98% and 13.43% compared with that of CK, respectively; there was no significant difference in rice yield in the range of 90000-225000 hills/hm ², and the effects of dry matter and nitrogen accumulation increased with the increase of density; the nitrogen, phosphorus and potassium requirements of above ground plants per 1000 kg of rice were 10.24-16.74, 1.31-2.72, 34.38-56.49 kg/hm ², respectively. Therefore, nitrogen fertilizer should be controlled, and phosphorus and potassium fertilizer should be increased in fertilizer management of medium-high yield fish culture paddy fields.

Key words: fish culture in paddy field, hybrid middle rice, nitrogen interaction, soil nutrients, matter accumulation

CLC Number:

S311

Xu Fuxian, Zhou Xingbing, Zhang Lin, Jiang Peng, Liu Mao, Guo Xiaoyi, Zhu Yongchuan, Xiong Hong. Interaction Between Fish Culture and Nitrogen Application: Effects on Soil Fertility, Rice Yield and Nutrient Accumulation in Paddy Fields[J]. Chinese Agricultural Science Bulletin, 2020, 36(15): 1-7.

Figures/Tables 10

References 24

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处理	时期	pH值	有机质/(g/kg)	全氮/(g/100 g)	全磷/(g/100 g)	全钾/(g/100 g)	水解氮/(mg/kg)	有效磷/(mg/kg)	有效钾/(mg/kg)
CK	试验前	5.18a	24.68b	0.18ab	0.081a	4.18a	129.33ab	4.72a	131.00a
CK	试验后	5.11a	20.67c	0.13b	0.047b	1.87b	111.33b	1.31b	57.50b
F	试验前	5.15a	24.77b	0.19ab	0.089a	4.12a	124.00ab	5.59a	131.00a
F	试验后	5.27a	29.10a	0.16ab	0.049b	1.99b	121.33ab	1.22b	64.67b
FN	试验前	5.20a	25.95b	0.19ab	0.091a	3.85a	120.17ab	4.73a	121.83a
FN	试验后	5.18a	31.43a	0.21a	0.051b	1.97b	134.33a	1.20b	55.50b
F值		0.95	23.43^**	3.71^*	55.97^**	216.32^**	2.96^*	25.78^**	54.13^**

处理	时期	pH值	有机质/(g/kg)	全氮/(g/100 g)	全磷/(g/100 g)	全钾/(g/100 g)	水解氮/(mg/kg)	有效磷/(mg/kg)	有效钾/(mg/kg)
CK	试验前	5.18a	24.68b	0.18ab	0.081a	4.18a	129.33ab	4.72a	131.00a
CK	试验后	5.11a	20.67c	0.13b	0.047b	1.87b	111.33b	1.31b	57.50b
F	试验前	5.15a	24.77b	0.19ab	0.089a	4.12a	124.00ab	5.59a	131.00a
F	试验后	5.27a	29.10a	0.16ab	0.049b	1.99b	121.33ab	1.22b	64.67b
FN	试验前	5.20a	25.95b	0.19ab	0.091a	3.85a	120.17ab	4.73a	121.83a
FN	试验后	5.18a	31.43a	0.21a	0.051b	1.97b	134.33a	1.20b	55.50b
F值		0.95	23.43^**	3.71^*	55.97^**	216.32^**	2.96^*	25.78^**	54.13^**

处理		pH值	有机质/ (g/kg)	全氮/ (g/100g)	全磷/ (g/100g)	全钾/ (g/100g)	水解氮/ (mg/kg)	有效磷/ (mg/kg)	有效钾/ (mg/kg)
鱼氮(A)	CK	5.14a	22.68b	0.16b	0.064b	3.02a	120.33a	3.02a	94.25a
	F	5.21a	26.93ab	0.17ab	0.069ab	3.06a	122.67a	3.40a	97.83a
	FN	5.19a	28.69a	0.20a	0.071a	2.91a	127.25a	2.97a	88.67a
时期(B)	试验前	5.17a	25.13b	0.19a	0.087a	4.05a	124.50a	5.01a	127.94a
时期(B)	试验后	5.18a	27.07a	0.16b	0.049b	1.94b	122.33a	1.24b	59.22b
F值	A	0.69	9.80^**	8.52^*	6.77^*	1.45	4.53	1.28	3.22
	B	0.04	10.67^**	45.21^**	60.99^**	933.21^**	0.87	114.00^**	582.43^**
	A×B	1.78	15.91^**	27.49^**	1.68	3.28	15.41^**	0.73	0.70

处理		pH值	有机质/ (g/kg)	全氮/ (g/100g)	全磷/ (g/100g)	全钾/ (g/100g)	水解氮/ (mg/kg)	有效磷/ (mg/kg)	有效钾/ (mg/kg)
鱼氮(A)	CK	5.14a	22.68b	0.16b	0.064b	3.02a	120.33a	3.02a	94.25a
	F	5.21a	26.93ab	0.17ab	0.069ab	3.06a	122.67a	3.40a	97.83a
	FN	5.19a	28.69a	0.20a	0.071a	2.91a	127.25a	2.97a	88.67a
时期(B)	试验前	5.17a	25.13b	0.19a	0.087a	4.05a	124.50a	5.01a	127.94a
时期(B)	试验后	5.18a	27.07a	0.16b	0.049b	1.94b	122.33a	1.24b	59.22b
F值	A	0.69	9.80^**	8.52^*	6.77^*	1.45	4.53	1.28	3.22
	B	0.04	10.67^**	45.21^**	60.99^**	933.21^**	0.87	114.00^**	582.43^**
	A×B	1.78	15.91^**	27.49^**	1.68	3.28	15.41^**	0.73	0.70

处理	密度/(万穴/hm²)	有效穗/(万/hm²)	穗粒数	结实率/%	千粒重/g	产量/(kg/hm²)
CK	9.0	139.2e	154.68ab	90.07a	31.59a	6930.0d
	13.5	177.8cd	137.33bc	91.87a	31.51a	6870.0d
	18.0	195.0bc	112.92d	93.54a	32.35a	7340.1cd
	22.5	192.8bc	125.28cd	89.91a	32.23a	7492.5bcd
F	9.0	149.4de	162.07a	92.34a	31.89a	7500.0bcd
	13.5	181.8cd	137.51bc	93.35a	32.10a	8335.1abc
	18.0	198.6bc	138.76bc	92.07a	32.08a	8440.1ab
	22.5	234.8a	129.71cd	91.96a	32.17a	8202.6abc
FN	9.0	182.4cd	157.08ab	93.21a	32.12a	8682.6a
	13.5	207.9abc	144.39abc	93.86a	32.33a	8867.6a
	18.0	224.4ab	142.86abc	92.16a	32.84a	8997.6a
	22.5	239.3a	132.64c	92.58a	32.47a	8665.1a
F值		7.45^**	5.14^**	0.93	1.72	5.61^**