Acta Agriculturae Boreali-Sinica ›› 2022, Vol. 37 ›› Issue (6): 159-165. doi: 10.7668/hbnxb.20193175

Special Issue: Rice Soil fertilizer

• Resources & Environment·Plant Protection • Previous Articles     Next Articles

Effects of Different Long-term Fertilizer Managements on Soil Acid Neutralizing Capacity in the Double-cropping Rice Field of Southern China

SHI Lihong, SUN Mei, TANG Haiming , LONG Zedong, SUN Geng, WEN Li, LI Chao, LUO Zunchang   

  1. Hunan Soil and Fertilizer Institute,Changsha 410125,China
  • Received:2022-03-07 Published:2022-12-28

Abstract:

In order to explore the effects of different long-term (36 a)fertilizer treatments on characteristics of soil acid buffering capacity at different soil layers (0—10 cm and 10—20 cm)under the double-cropping rice field in Southern of China,four different fertilizer treatments were set up:without any fertilizer input as a control(CK),chemical fertilizer alone (MF),rice straw and chemical fertilizer (RF),and 30% organic manure and 70% chemical fertilizer (OM).Soil acid neutralizing capacity(ANC),acid buffering capacity(ABC),instant acid buffering capacity(IAC),ammonium nitrogen($\text{NH}_{4}^{+}$-N),nitrate nitrogen($\text{NO}_{3}^{-}$-N)contents,and its relationship between soil acid buffering capacity and soil physicochemical properties were analysis.This result indicated that soil ANC,ABC and IAC at soil 0—10 cm and 10—20 cm layer in the double-cropping rice field with MF,RF and OM treatments were increased.The order of soil ANC,ABC and IAC at soil 0—10 cm and 10—20 cm layer in paddy field with all fertilizer treatments showed OM>RF>MF>CK.Compared with CK treatment,soil ANC and ABC at 0—10 cm and 10—20 cm layer in paddy field with OM treatment increased by 36.78%,33.18% and 18.67%,17.84%,respectively.Soil IAC at 0—10 cm and 10—20 cm layer in paddy field with OM treatment increased by 15.22% and 14.02%,compared with CK treatment,respectively.This result indicated that soil $\text{NH}_{4}^{+}$-N content at 0—10 cm and 10—20 cm layer in paddy field with MF treatment were significantly higher than that of RF,OM and CK treatments.Soil $\text{NH}_{4}^{+}$-N content at 0—10 cm and 10—20 cm layer in paddy field with MF treatment increased by 48.15% and 51.09%,compared with CK treatment,respectively.This result showed that soil $\text{NO}_{3}^{-}$-N content at 0—10 cm and 10—20 cm layer in paddy field with OM treatment were significantly higher than that of MF,RF and CK treatments.Soil $\text{NO}_{3}^{-}$-N content at 0—10 cm and 10—20 cm layer in paddy field with OM treatment increased by 204.73% and 161.94%,compared with CK treatment,respectively.Soil ANC,ABC,IAC,$\text{NH}_{4}^{+}$-N and $\text{NO}_{3}^{-}$-N contents at 0—10 cm layer were obvious higher than that of 10—20 cm layer in paddy field under the same fertilizer treatment condition.It had significantly positive correlation between soil ANC,ABC,IAC and soil organic carbon,total nitrogen contents,electrical conductivity in paddy field.Meanwhile,there had extremely significantly positive correlation between soil ANC,ABC,IAC and soil pH,cation exchange capacity in paddy field.As a result,it was effective practices for increasing soil acid buffering capacity at plough layer under the double-cropping rice field in Southern of China by combined application of rice straw or 30% organic manure with chemical fertilizer managements.

Key words: Double-cropping rice field, Long-term fertilizer, Soil acidification, Soil acid buffering capacity

Cite this article

SHI Lihong, SUN Mei, TANG Haiming, LONG Zedong, SUN Geng, WEN Li, LI Chao, LUO Zunchang. Effects of Different Long-term Fertilizer Managements on Soil Acid Neutralizing Capacity in the Double-cropping Rice Field of Southern China[J]. Acta Agriculturae Boreali-Sinica, 2022, 37(6): 159-165. doi: 10.7668/hbnxb.20193175.

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