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Journal of Zhejiang University (Agriculture and Life Sciences)  2022, Vol. 48 Issue (5): 566-572    DOI: 10.3785/j.issn.1008-9209.2021.09.171
Horticultural sciences     
Effects of drip fertigation on production effect of mountain citrus orchard
Mingxia WEN(),Hui XI,Shaohui WU,Na LI,Xijing CHEN
Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
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Abstract  

Taking satsuma mandarin (Citrus unshiu Marc.) grown in mountainous areas as the research object, and custom fertilization of farmers (only applying chemical fertilizer, the input amounts of N, P2O5, K2O were 211.5, 180.0, 220.5 kg/hm2, respectively) as the control (CF), different combinations of fertilization with organic matter and chemical fertilizer decrement (DF1: the input amounts of N, P2O5, K2O were 153.0, 63.0, 157.5 kg/hm2, respectively; DF2: the input amounts of N, P2O5, K2O were 180.0, 108.0, 211.5 kg/hm2, respectively) were set to study the effects of drip fertigation on citrus yield, quality, nutrient absorption and soil fertility. The results showed that citrus yields of drip fertigation treatments with DF1 and DF2 increased by 17.5% and 16.4%, respectively, as compared with the control. The drip fertigation treatments with DF1 and DF2 could also increase fruit quality. The total soluble solid content increased by 11.4% and 10.5%, and vitamin C content increased by 26.7% and 13.6%, and the total acid content decreased by 16.2% and 21.6%, respectively, as compared with the control. In addition, drip fertigation treatments could significantly increase the absorption of calcium (Ca), magnesium (Mg) and boron (B) in leaves and fruits, which were higher than those of the control. Drip fertigation treatments also had a great impact on soil pH and soil fertility. The soil pH value of DF1 and DF2 treatments was higher than that of the control, and the organic matter content increased by 27.1% and 20.0%, respectively, and the hydrolysable nitrogen (N) content increased by 88.3% and 105.2%, respectively. The soil exchangeable Ca, exchangeable Mg and available B contents were also significantly higher than those of the control. It can be seen that while saving chemical fertilizer, drip fertigation can improve soil fertility, promote the nutrient absorption and utilization of leaves and fruits, and then increase citrus yield and improve fruit quality. Therefore, drip fertigation is an important measure to reduce chemical fertilizer application, improve quality and efficiency in citrus orchards.



Key wordsdrip fertigation      citrus yield      quality      soil fertility      nutrient absorption     
Received: 17 September 2021      Published: 02 November 2022
CLC:  S 666.2  
Corresponding Authors: Mingxia WEN     E-mail: wenmx198@126.com
Cite this article:

Mingxia WEN,Hui XI,Shaohui WU,Na LI,Xijing CHEN. Effects of drip fertigation on production effect of mountain citrus orchard. Journal of Zhejiang University (Agriculture and Life Sciences), 2022, 48(5): 566-572.

URL:

https://www.zjujournals.com/agr/10.3785/j.issn.1008-9209.2021.09.171     OR     https://www.zjujournals.com/agr/Y2022/V48/I5/566


滴灌施肥对山地柑橘园生产效应的影响

以山地种植的温州蜜柑(Citrus unshiu Marc.)为研究对象,以农民习惯施肥(只施化肥,N、P2O5、K2O养分投入量分别为211.5、180.0、220.5 kg/hm2)为对照(CF),设置不同的滴灌施肥处理(DF1:化肥减量施用,N、P2O5、K2O养分投入量分别为153.0、63.0、157.5 kg/hm2;DF2:化肥减量施用,N、P2O5、K2O养分投入量分别为180.0、108.0、211.5 kg/hm2),研究滴灌施肥对柑橘产量、品质、养分吸收和土壤肥力的影响。结果表明:滴灌施肥处理的柑橘产量较高,DF1和DF2处理分别比对照提高17.5%和16.4%;果实品质也较好,DF1和DF2处理的可溶性固形物含量分别比对照增加11.4%和10.5%,维生素C含量分别提高26.7%和13.6%,总酸含量分别降低16.2%和21.6%;此外,滴灌施肥处理还可以显著地增加叶片和果实对钙、镁、硼的吸收。滴灌施肥对土壤pH值及土壤肥力的影响也较大,DF1和DF2处理的土壤pH值高于对照,有机质含量分别比对照提高27.1%和20.0%,水解性氮含量分别增加88.3%和105.2%,土壤交换性钙、交换性镁和有效硼含量也显著高于对照。由此可见,滴灌施肥在节约化肥的同时,可以改善土壤肥力,提高柑橘对养分的吸收利用,进而提高果实产量,改善果实品质,是柑橘园减少化肥施用、提质增效的一项重要措施。


关键词: 滴灌施肥,  柑橘产量,  品质,  土壤肥力,  养分吸收 
处理 TreatmentNP2O5K2O
习惯施肥 Custom fertilization (CF)211.5180.0220.5
滴灌施肥1 Drip fertigation 1 (DF1)153.063.0157.5
滴灌施肥2 Drip fertigation 2 (DF2)180.0108.0211.5
Table 1 Nutrient inputs of different treatments

处理

Treatment

单果质量

Single fruit mass/g

每株挂果数

Fruit amount in a tree

产量

Yield/(t/hm2)

CF104.0±20.3a323±53b37.7±2.0b
DF1103.8±22.2a579±60a44.3±0.8a
DF298.3±11.3a488±57a43.9±2.4a
Table 2 Effects of different fertilization treatments on fruit yield

处理

Treatment

可食率

Edible rate/%

果皮厚度Peel thickness/mm

可溶性固形物

Total soluble solid/%

总酸

Total acid/(g/L)

维生素C

Vitamin C/(mg/kg)

CF79.2±1.1a2.93±0.16a10.5±0.1b7.4±0.3a279.0±11.3c
DF179.6±0.8a1.96±0.13a11.7±0.4a6.2±0.0b353.5±10.6a
DF280.1±0.2a1.98±0.78a11.6±0.2a5.8±0.6b317.0±4.2b
Table 3 Effects of different fertilization treatments on fruit quality

处理

Treatment

全氮

Total N/(g/kg)

全磷

Total P/(g/kg)

全钾Total K/(g/kg)全钙Total Ca/(g/kg)

全镁

Total Mg/(g/kg)

全硼

Total B/(mg/kg)

CF25.9±0.7a1.13±0.00a9.1±1.4b25.4±0.7c1.59±0.71c68.5±1.2c
DF124.9±4.9a1.11±0.04a7.7±1.4c34.7±7.1a2.13±0.14a88.4±0.4a
DF225.2±5.0a1.12±0.03a10.2±3.5a28.1±3.5b1.89±0.21b73.7±0.8b
Table 4 Effects of different fertilization treatments on nutrient concentrations of leaves

处理

Treatment

含水率

Moisture/%

吸氮量

N absorption/(kg/hm2)

吸磷量

P absorption/(kg/hm2)

吸钾量

K absorption/(kg/hm2)

CF85.5a39.3c4.04ab34.6b
DF185.7a54.4a4.91a54.4a
DF286.8a44.5b3.35b52.9a
Table 5 Effects of different fertilization treatments on nutrient absorption of fruits
处理TreatmentpH有机质Organic matter/(g/kg)

水解性氮

Hydrolysable N/(mg/kg)

有效磷

Available P/(mg/kg)

速效钾Available K/(mg/kg)

交换性钙

Exchangeable Ca/(cmol/kg)

交换性镁Exchangeable Mg/(cmol/kg)有效硼Available B/(mg/kg)
CF5.19±0.02b40.6±1.9b144.3±1.8c350.0±5.0b180.3±1.5b1.94±0.12c0.58±0.02c0.74±0.04c
DF15.63±0.04a51.6±2.5a271.7±1.8b353.3±7.6b331.3±4.0a12.47±0.61a1.80±0.03a1.10±0.04a
DF25.61±0.05a48.7±1.9a296.1±2.8a368.3±2.9a183.0±1.7b7.18±0.13b1.14±0.02b0.88±0.09b
Table 6 Effects of different fertilization treatments on soil fertility in citrus orchard
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