Crops ›› 2016, Vol. 32 ›› Issue (3): 110-115.doi: 10.16035/j.issn.1001-7283.2016.03.021

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Effects of Combination of Organic and Inorganic Fertilizer on Soil Microbial and Nutrient Content of Continuous Cropping of Maize

Zhang Wanting1,Jin Chenggong1,Zhang Huan1,Jiang Baiwen1,Zhou Baoku2,Xie Xiaowei1,Guo Ting1   

  1. 1College of Resources and Environment,Northeast Agricultural University,Harbin 150030,Heilongjiang,China
    2Institute of Soil Fertilizer and Environment Resources,HAAS,Harbin 150086,Heilongjiang,China
  • Received:2016-01-14 Revised:2016-03-31 Online:2016-06-15 Published:2018-08-26
  • Contact: Baiwen Jiang

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Abstract:

Through field experiment, we explored the effects of different proportion of chemical fertilizer and organic fertilizer on soil microbes, nutrient content and yield of continuous cropping of maize. The results showed that the combination of organic and inorganic fertilizer could effectively improve soil microbial environment and provide nutrition. At the same time, it could optimize soil microbial community structure, increasing the number of bacteria and actinomycetes, as well as reducing the amount of harmful fungi.During the maize growth period, the content of soil available nitrogen and available phosphorus climbed up and then declined except M4.The soil available phosphorus reached 5% level of significant differences with M2 treatment compared with other processing.The maize yield under different treatments showed: M2(80% urea nitrogen + 20% organic nitrogen, P2O5:75kg/hm 2; K2O:90kg/hm 2) > M3 (70% urea nitrogen + 30% organic nitrogen, P2O5:75kg/hm 2; K2O:90kg/hm 2) > M1(100% organic fertilizer nitrogen) > M4(urea 150kg/hm 2; P2O5:75kg/hm 2; K2O:90kg/hm 2) > CK(no fertilizering). The yield increased significantly when chemical fertilizer and bio-organic fertilizer were both used, and the difference was significant.

Key words: Maize, Combination application of organic and inorganic fertilizer, Nutrient content, Microbes, Yield

Table 1

Fertilization scheme"

处理
Treatments		 有机肥氮(%)
Organic fertilizer-N		 尿素氮(%)
Urea-N		 P2O5
(kg/hm2)		 K2O
(kg/hm2)
M1 100 0 75 90
M2 20 80 75 90
M3 30 70 75 90
M4 0 100 75 90
CK 0 0 0 0

Table 2

Dynamic changes of soil bacteria number at different maize growth stages 107CFU/g"

处理
Treatments		 拔节期
Jointing stage		 抽雄期
Tasseling stage		 成熟期
Mature stage
M1 12.76a 15.94b 10.36a
M2 5.98b 23.92a 5.98b
M3 4.78bc 21.92a 5.98b
M4 4.38bc 20.73a 4.78bc
CK 2.39c 10.36c 2.39c

Table 3

Dynamic changes of soil actinomycetes number at different maize growth stages 104CFU/g"

处理
Treatments		 拔节期
Jointing stage		 抽雄期
Tasseling stage		 成熟期
Mature stage
M1 6.54a 9.34a 3.05a
M2 3.53b 6.88b 1.83b
M3 2.72b 3.98c 2.88a
M4 1.10c 2.11d 1.60b
CK 1.42c 1.45e 0.48c

Table 4

Dynamic changes of soil fungi number at different maize growth stages 103CFU/g"

处理
Treatments		 拔节期
Jointing stage		 抽雄期
Tasseling stage		 成熟期
Mature stage
M1 3.55a 4.77a 1.27c
M2 1.36d 1.86b 0.96d
M3 1.80cd 2.17b 0.90d
M4 2.06c 2.50b 1.88b
CK 2.72b 1.80b 2.89a

Table 5

Correlation analysis between soil bacteria number at different stage and the maize yield"

拔节期 Jointing stage 抽雄期 Tasseling stage 成熟期 Muture stage
0.984* 0.989** 0.999*

Fig.1

Changes of soil available nitrogen content at different maize growth stages Significantly differences at 0.05 were showed with different letter in the same stage,the same below"

Fig.2

Changes of soil available phosphorus content at different maize growth stages"

Fig.3

Changes of soil available potassium content at different maize growth stages"

Table 6

The effect of different treatments on maize yield and its components"

处理
Treatments		 轴粗(cm)
Ear diameter		 穗长(cm)
Ear length		 穗粒数
Number of kernels per ear		 秃尖长(cm)
Bald ear length		 百粒重(g)
Weight of 100 kernels		 产量(含水量14%)
Yield(kg/hm2)
M1 3.00b 17.96b 456.8b 1.66a 27.0b 6 911.13c
M2 3.21a 21.24a 599.8a 0.36b 33.4a 11 206.33a
M3 3.15a 21.07a 594.6a 0.40b 32.6a 10 862.25a
M4 3.16a 20.75a 567.8a 0.52b 31.9a 10 139.36b
CK 2.82c 16.06c 393.2b 2.04a 22.3c 4 899.38d
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