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Title:: Study on the Effects and Amounts of Combined Application of Nitrogen, Phosphorus and Potassium Fertilizers for Spring Soybean in Southern China

Author(s):: CHEN Huai-zhu; YANG Shou-zhen; TANG Xiang-min; SUN Zu-dong; ZENG Wei-ying; CAI Zhao-yan; LAI Zhen-guang; （Cash Crops Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China）

Keywords:: Spring soybean; “3414”fertilizer experiment; Fertilizer model; Yield; Fertilization

PACS:: S565.1

DOI:: 10.11861/j.issn.1000-9841.2018.01.0117

Abstract:: To find out the appropriate amount of fertilizer for spring soybean production in South China, we carried out the study on the effects of combined application of N, P and K fertilizers and recommended fertilizers amount according to the ‘3414’ fertilizer experiment design using Guichundou 106 as material. The results showed that: (1)Nitrogen, phosphorus and potassium fertilizers could significantly increase the yield of spring soybean in South China. The yield increasing effect was P>N>K. Interaction effect also existed between nitrogen, phosphorus and potassium. The interaction effect of these three fertilizers on soybean yield was NP>PK>NK. (2) The model optimal analysis showed that it is reasonable and feasible to make the fertilization decision by using the three element fertilizer function model. The recommended fertilization amount was obtained through the regression model. The maximum soybean yield could be reached when N, P2O5 and K2O were applied with 80.6, 21.6 and 58.4 kg·hm ^-2 respectively. The optimum economic yield could be achieved when N, P2O5 and K2O were applied with 75.5, 21.3, 54.1 kg·hm ^-2 respectively. These results provide guidance for the rational fertilization of spring soybean in South China, and provide the basis for the establishment of fertilization index system in the future.

References:

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Study on the Effects and Amounts of Combined Application of Nitrogen, Phosphorus and Potassium Fertilizers for Spring Soybean in Southern China(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

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