Effects of the cowpea yield under different fertilization modes in Pearl River Delta

doi:10.14088/j.cnki.issn0439-8114.2021.17.005

Abstract

Abstract: Using field cultivation method, the experiment was laid out in a randomized complete block design （RCBD） with 11 treatments replicated 3 times, including N₀P₀K₀, N₀P₂K₂, N_0.5P₂K₂, N₁P₂K₂, N_1.5P₂K₂,N₂P₂K₂, N_2.5P₂K₂, N₃P₂K₂, N₂P₀K₂, N₂P₂K₀, MN₂P₂K₂, to compare the differences in cowpea yield and other indexes. The results showed that with the same investment of phosphate and potash fertilizer, yield, net income and cowpea/straws（c/s） showed increasing tendencies divided by N_1.5. When N∈（1.5,2.5）, nitrogen rate is negatively correlated with c/s. When N∈（2.5,3], nitrogen rate was positively correlated with c/s. The yield, net income and c/s reached maximum as the MN₂P₂K₂ treatment. The experiment proved that the most influential factor of cowpea yield was nitrogen, phosphate and potash fertilizer were not obvious. The application of organic fertilizer and chemical fertilizer increased cowpea yield most influentially.

Key words: cowpea, yield, nitrogen, organic fertilizer

CLC Number:

S643.4

ZHANG Xiang-hui, MA Xiao-xiao, DONG Bin, CHANG Juan-xia, ZHANG Xiao-qin, WANG Bing, LIN Ying-yin, SUN Jian-qiang. Effects of the cowpea yield under different fertilization modes in Pearl River Delta[J]. HUBEI AGRICULTURAL SCIENCES, 2021, 60(17): 23-26.

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