Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (4): 1-7.doi: 10.11924/j.issn.1000-6850.casb20200300244

Special Issue: 水稻

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Effects of Combined Application of Slow-Release Fertilizer and Inorganic Fertilizer on Rice Growth and Eating Quality in Coastal Saline Alkali Land

Dong Xiaoliang1(), Hou Hongyan1, Zhang Jinfeng2, Zhou Hong1, Zhang Maolin3, Wei Lixing4, Zhu Defeng5()   

  1. 1Dongying Yibang Agriculture Science and Technology Development Co., Ltd., Dongying Shandong 257000
    2Dongying Agricultural Technology Extension Service Center of Kenli District, Dongying Shangdong 257000
    3Dongying Yuanshuo Agriculture Co., Ltd., Dongying Shandong 257000
    4Dongying Academy of Agricultural Sciences, Dongying Shandong 257000
    5China National Rice Research Institute, Hangzhou 310000
  • Received:2020-03-23 Revised:2020-08-26 Online:2021-02-05 Published:2021-01-25
  • Contact: Zhu Defeng E-mail:13405467797@163.com;cnrice@qq.com

Abstract:

The effects of N application on rice growth period, growth characteristics, yield and eating quality under the combination of slow-release fertilizer and inorganic fertilizer were studied. ‘Nanjing 9108’ was taken as the experimental material, five fertilization treatments were designed under the condition of 3‰-6‰ soil salt content. The root index, leaf area index and dry matter accumulation were measured at the key nodes of growth period, and the growth index and eating quality of rice were compared. The results showed that, the reproductive growth period ratio in T3 group (the treatment group with slow-release fertilizer and inorganic fertilizer and 20% reduction of N content) was 0.25% shorter than that in T1 group (the treatment group with total N fertilizer and inorganic fertilizer), and the ratio of vegetative growth period increased by 0.23% and the whole growth period decreased by 2 days. The total root length, leaf area index, dry matter accumulation per unit leaf area, stem sheath dry matter per unit area and yield trend of rice were T3> T1> T2> T4> T5. There was a negative correlation between protein content and eating value in rice. The higher the protein content, the lower the taste value. There was also a negative correlation between amylose content and taste value in rice. The higher the amylose content, the lower the taste value. With the increase of nitrogen application, the eating quality of rice reduced significantly. The T5 treatment group without N element had the highest taste value. The combination of slow-release fertilizer and inorganic fertilizer enhanced the soil fertility, but the rice had the lowest taste value. When slow-release fertilizer and inorganic fertilizer were applied together, and the N content was reduced by 20% and panicle fertilizer was not applied with any N treatment, the growth index and eating value of rice could be significantly improved.

Key words: coastal saline alkali land, slow release fertilizer, rice, yield index, taste quality

CLC Number: