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Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (29): 93-99.doi: 10.11924/j.issn.1000-6850.casb2020-0101

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Effects of Rice Husk Biochar and Zeolite on Phosphorus Availability in Latosolic Red Soil and Fluvo-aquic Soil

Zhu Jing1,2(), Bai Yuchao1,2, Wang Zongkang2, Zhang Xinming1()   

  1. 1College of Nature Resources and Environment, South China Agricultural University, Guangzhou 510642
    2 Shenzhen Batian Ecotypic Engineering Co., Ltd., Shenzhen Guangdong 518105
  • Received:2020-05-13 Revised:2020-07-20 Online:2020-10-15 Published:2020-10-16
  • Contact: Zhang Xinming E-mail:513087982@qq.com;xmzhang@scau.edu.cn

Abstract:

In this paper, the effects of rice husk biochar and zeolite addition on P availability of mixed fertilizer in latosolic red soil and fluvo-aquic soil were studied, in order to use rice husk biochar and zeolite to improve the availability of P fertilizer in soil, slow down the P fixation and improve the P utilization rate of P fertilizer. The effect of the addition amounts and combined ratios of rice husk biochar and zeolite in mixed fertilizer on P availability in soil were studied by laboratory culture experiments and field plot experiments, and P fertilizer use ratio in tomato was studied. The results showed that the addition amounts and combined ratios of rice husk biochar and zeolite had significant effects on the latosolic red soil available phosphorus content, and the available phosphorus content displayed significant interaction between addition amounts and combined ratios. The addition amount was the dominant factor that affected the latosolic red soil available P content. The combined ratios of rice husk biochar and zeolite had significant effect on the fluvo-aquic soil available P content, and they were the dominant factor on the latosolic red soil available P content. Compared with CK, the utilization ratio of P in tomato increased (31.05%-76.46%) with the mixed fertilizer added rice husk biochar and zeolite (5%-10%), P fertilizer use ration in tomato increased in the treatment of rice husk biochar and zeolite combined addition. The addition of rice husk biochar and zeolite could improve the P efficiency of the mixed fertilizer in the soil. The findings could have a positive effect on reducing the application of phosphate fertilizer and improving its utilization rate.

Key words: rice husk biochar, zeolite, Pavailability, fertilizer use ratio, phosphorus

CLC Number: