Crops ›› 2020, Vol. 36 ›› Issue (2): 134-139.doi: 10.16035/j.issn.1001-7283.2020.02.020

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Effects of Seaweed Extract on Yield, Quality and Nitrogen Use Efficiency of Sweet Corn

Chen Diwen1,Zhou Wenling1,Ao Junhua1(),Huang Ying1,Jiang Yong1,Han Xihong2,Qin Yimin2,Shen Hong3   

  1. 1 Guangdong Bioengineering Institute (Guangzhou Sugarcane Industry Research Institute)/Guangdong Provincial Key Laboratory of Sugarcane Improvement and Biorefinery/Guangdong Modern Agricultural Technology Research and Development Center (Resources and Environment and Agricultural Product Safety), Guangzhou 510316, Guangdong, China
    2 Qingdao Brightmoon Seaweed Group Co. Ltd., Key Laboratory of Seaweed Fertilizers of Ministry of Agriculture and Rural Affairs, Qingdao 266400, Shandong, China
    3 College of Resource and Environment, South China Agricultural University, Guangzhou 510642, Guangdong, China
  • Received:2019-09-10 Revised:2019-11-22 Online:2020-04-15 Published:2020-04-13
  • Contact: Junhua Ao E-mail:junhuaao@qq.com

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Abstract:

A field experiment was conducted to determine the effects of seaweed extracts on yield, quality and nitrogen use efficiency of sweet corn variety “Zhengtian 68”. Five treatments were set for the test: Conventional fertilization (T1), conventional fertilization + seaweed extract foliar application (T2), conventional fertilization with 20% N reduction (T3), conventional fertilization with 20% N reduction + seaweed extract foliar application (T4), no nitrogen (T0). The results showed that the yield of T2 treatment was the highest, and the yield increased by 7.11% and 8.24% in two seasons respectively compared with T1. There was no significant yield difference between T4 and T1. The soluble sugar content of T4 in spring and autumn was 5.29% and 5.36% higher respectively than that of T1. Nitrogen use efficiency of T4 was the highest, which was significantly higher than T1 and T2. At the same time, the nitrogen use efficiency of T2 was significantly higher than that of T1. The agronomic efficiency of nitrogen fertilizer in the treatment of T2 and T4 was significantly higher than that in the treatment without seaweed extract, respectively. The partial productivity of nitrogen fertilizer of T4 was significantly higher than that of T1. The net income per hectare of sweet corn in spring and autumn increased by 11.71% and 13.64% respectively compared with T1. The net income of T4 was 6.18% and 5.99% higher than that of T3 in two seasons.

Key words: Sweet corn, Seaweed extract, Yield, Soluble sugar content, Nitrogen use efficiency

Table 1

Fertilizer types, proportion and dosage of different treatments"

编号
Number		 处理
Treatment		 N (kg/hm2) P2O5 (kg/hm2) K2O (kg/hm2) 海藻提取物Seaweed extract (L/hm2)
攻苗肥/攻穗肥
Seedling/Heading		 攻苗肥
Seedling		 攻苗肥/攻穗肥
Seedling/Heading		 12叶期/吐丝期
V12/Silking
T0 不施氮肥 0 180 162/108 0
T1 常规施肥 172.5/172.5 180 162/108 0
T2 常规施肥+海藻提取物 172.5/172.5 180 162/108 1.5/1.5
T3 常规施肥减氮20% 138.0/138.0 180 162/108 0
T4 常规施肥减氮20%+海藻提取物 138.0/138.0 180 162/108 1.5/1.5

Table 2

The effects of different treatments on yield and yield components of sweet corn"

季节
Season		 处理
Treatment		 鲜产量
Fresh yield (kg/hm2)		 单穗鲜重
Ear fresh weight (g)		 穗长
Ear length (mm)		 百粒鲜重
100-grain fresh weight (g)		 穗行数
Row number per ear		 每行粒数
Grain per row
春季Spring T0 06 721c 156.82c 11.50b 29.10b 14.50a 21.20b
T1 12 205ab 270.80ab 18.80a 36.50a 14.98a 36.30a
T2 13 073a 291.21a 19.30a 37.21a 15.10a 37.04a
T3 11 749b 260.34b 18.10a 35.33a 15.01a 36.30a
T4 12 174ab 270.70ab 18.80a 36.42a 15.17a 36.20a
秋季Autumn T0 08 059c 183.53c 13.20b 28.85b 14.86a 24.50b
T1 12 703ab 284.35ab 19.10a 37.12a 15.18a 37.25a
T2 13 749a 308.32a 19.60a 38.97a 15.11a 37.16a
T3 12 246b 274.67b 19.20a 37.07a 15.01a 36.74a
T4 12 800ab 286.18ab 19.30a 37.12a 15.12a 36.57a

Table 3

Soluble sugar content of sweet corn under different treatments"

处理Treatment 春季Spring (%) 秋季Autumn(%)
T0 11.67b 10.80b
T1 11.97ab 11.20ab
T2 12.50a 11.60a
T3 12.47a 11.70a
T4 12.60a 11.80a

Table 4

Effects of different fertilizer treatments on N use efficiency of sweet corn"

季节
Season		 处理
Treatment		 氮素累积量
N accumulation
(kg/hm2)		 氮素投入量
N input
(kg/hm2)		 氮素利用率
N use
efficiency (%)		 氮肥农学效率
N agronomic efficiency
(kg/kg)		 氮肥偏生产力
N partial productivity
(kg/kg)
春季Spring T0 105.33b 0 - - -
T1 172.63a 345 19.51d 15.90c 35.38b
T2 180.20a 345 21.70c 18.41ab 37.89b
T3 171.19a 276 23.86b 17.84b 42.20a
T4 177.29a 276 26.07a 19.76a 44.11a
秋季Autumn T0 112.14b 0 - - -
T1 183.29a 345 20.63c 13.46c 36.82c
T2 191.16a 345 22.90bc 16.49ab 39.85b
T3 180.28a 276 24.69ab 15.17b 44.37a
T4 183.83a 276 25.97a 17.18a 46.38a

Table 5

Effects of different treatments on economic benefit of sweet corn"

处理
Treatment		 产量Yield (kg/hm2) 肥料投入(元/hm2)
Fertilizer input
(yuan/hm2)		 总成本(元/hm2)
Total cost
(yuan/hm2)		 产值(元/hm2)
Output value (yuan/hm2)		 净收益(元/hm2)
Net profit (yuan/hm2)
春季Spring 秋季Autumn 春季Spring 秋季Autumn 春季Spring 秋季Autumn
T0 6 721 8 059 2 235 10 235 12 097 14 506 1 862 4 271
T1 12 205 12 703 3 698 11 698 21 969 22 865 10 272 11 167
T2 13 073 13 749 4 058 12 058 23 532 24 748 11 475 12 690
T3 11 646 12 246 3 405 11 405 20 963 22 043 9 558 10 638
T4 12 174 12 800 3 765 11 765 21 914 23 040 10 149 11 275
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