Effects of Different Combination of Organic and Inorganic Potassium on the Yield,Quality of Sweet Corn and the Content of Soil Microorganisms

doi:10.14088/j.cnki.issn0439-8114.2018.23.013

Abstract

Abstract: In order to clarify the optimum proportion for the combination application of organic and inorganic fertilizer on sweet corn（Zea mays L.）,the effects of different combination of organic and inorganic potassium on the yield,quality of sweet corn and the content of soil microorganisms were studied. The results showed that application of potassium fertilizer could significantly increase the leaf number and plant height of sweet corn,increase the content of nitrate,soluble sugar and soluble protein in fruit of sweet corn,and significantly increase the ear diameter,ear length,row grains and thousand kernel weight,while reducing the bald tip length of sweet corn,but no significant effect on the number of bract and ear rows. The potassium fertilization significantly influenced on the yield,dry matter and potassium accumulation of sweet corn,and they were increased by 11.02%~26.04%,28.42%~47.39% and 35.87%~68.97% respectively. The number of bacteria,fungi and actinomycetes in soil were increased. Organic fertilizer application could decrease the nitrate accumulation in sweet corn,and increase content of soluble sugar under the same condition of potassium rates. The yield,agronomic efficiency,potassium accumulation and apparent utilization of 30%OF and 70%CF treatment was 18 755 kg/hm²,21.53 kg/kg,194.89 kg/hm² and 44.19%,respectively. Potassium was mainly accumulated in sweet corn leaf and stem. The population of bacteria, fungi and actinomycetes in soil present that the treatment of organic matter mixed with chemical fertilizer were much higher than the treatment of single chemical fertilizer,and it was decreased with the organic potassium fertilizer proportion to the total potassium decreased. Analysis indicated that the effects of applying mixed fertilizer is superion to applying single fertilizer, and the effect of applying organic matter mixed with chemical fertilizer 3∶7 was the best.

Key words: combination application of organic and inorganic fertilizer, sweet corn（Zea mays L.）, yield, quality, soil microbial content

CLC Number:

S145.6

WANG Su-ping, DU Lei, CHEN Gang, HONG Juan, HUANG Xiang, ZHANG Gui-you, LIAN Zhi-cheng, ZHANG Li-hong, YE Li-xia, JIANG Li. Effects of Different Combination of Organic and Inorganic Potassium on the Yield,Quality of Sweet Corn and the Content of Soil Microorganisms[J]. HUBEI AGRICULTURAL SCIENCES, 2018, 57(23): 55-60.

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