CHINESE JOURNAL OF OIL CROP SCIENCES ›› 2023, Vol. 45 ›› Issue (1): 155-163.doi: 10.19802/j.issn.1007-9084.2021318

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Effects of N, P and K ratio on nutrient absorption, yield and economic benefit of peanut under sugarcane / peanut intercropping

Hai-ning WU(), Zhi-peng HUANG, Xiu-mei TANG, Fa-qian XIONG, Jing JIANG, Rui-chun ZHONG, Zhu-qiang HAN, Jing LIU, Liang-qiong HE(), Rong-hua TANG()   

  1. Cash Crops Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China
  • Received:2021-12-20 Online:2023-02-25 Published:2023-03-03
  • Contact: Liang-qiong HE,Rong-hua TANG E-mail:wuhaining86@qq.com;Heliangqiong@163.com;tronghua@163.com


To improve yield and economic benefit of the South China peanut production under sugarcane / peanut intercropping, field trials with 4 gradients of NPK fertilizers were conducted to investigate the fertilizer ratio on yield, NPK nutrient absorption and economic benefit. Results showed that the highest peanut yield and economic benefits could be obtained under 80 kg/hm2 N, 70 kg/hm2 P2O5, and 80-90 kg/hm2 K2O, and the harvest index and nutrient utilization rate are also higher. NP absorption in intercropped peanut increased with the NP fertilizer application, while excessive K fertilizer application inhibited K absorption by peanuts. The key period of dry matter accumulation and nutrient absorption of intercropped peanut was from anthesis needling to pod expansion. The dry matter accumulation of intercropped peanuts increased with NPK application. For each 1000 g dry matter forming, it needed to absorb and assimilate 17.7 g N, 1.7 g P2O5 and 11.3 g K2O, with the absorption ratio as 10.4 : 1 : 6.6 (N : P2O : K2O). The nutrient absorption ratio per 100 kg pods varied depending on NPK fertilizers ratio, as 6.83-7.98 kg N, 0.65-0.80 kg P2O5, and 4.10-5.32 kg K2O. Therefore, the recommended N, P2O5 and K2O application rate of intercropped peanut in South China with the best economic benefit was 80 kg/hm2 N, 70 kg/hm2 P2O5, and 80-90 kg/hm2 K2O.

Key words: intercropped peanut, N, P, K ratio, yield profit, nutrient utilization

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