Abstract:

The differences of dry matter accumulation and nitrogen, phosphorus and potassium requirement of different peanut varieties were studied by field experiment with randomized block design, aiming to provide technical support for rational application of nitrogen, phosphorus potassium on peanut in wheat-peanut area with fluvo-aquic soil. Results showed that the dry matter stage accumulation and accumulation rate of peanut had a parabolic trend, and those of the late pegging period were the biggest, fertilization could increase the dry matter accumulation and accumulation rate by peanut in different growth and development stages, among the varieties, the accumulation and the accumulation rate of ‘Yuhua 9719’ were the largest, 3687.0 kg/hm², 184.3 kg/(hm²·d), respectively. The stage accumulation and stage accumulation rate of nitrogen and potassium had a parabolic trend, those of phosphorus of ‘Yuhua 9326’ had a bimodal curve trend, and those of potassium of ‘Yuhua 9719’ and ‘Yuhua 9620’ had a parabolic trend. The average requirement of nitrogen (N), phosphorus (P₂O₅) and potassium (K₂O) by ‘Yuhua 9719’ were the largest, 3.877, 1.103 and 1.456 kg, respectively. The average requirement of nitrogen (N), potassium (K₂O) by ‘Yuhua 9620’, and phosphorus (P₂O₅) by ‘Yuhua 9326’ were the smallest, 3.773, 1.375 and 1.058 kg, respectively. Compared with the nitrogen, the average proportion of phosphorus required by ‘Yuhua 9620’ was the largest, the average proportion of phosphorus required by ‘Yuhua 9326’ was the smallest, the average proportion of potassium by ‘Yuhua 9719’ was the largest, and that by ‘Yuhua 9620’ was the smallest. When the application rate of N, P₂O₅, K₂O was respectively 180, 120, 150 kg/hm² respectively, ‘Yuhua 9620’ was a variety with low requirement for nitrogen and potassium and high requirement for phosphorus, ‘Yuhua 9326’ was a variety with low requirement for phosphorus, ‘Yuhua 9719’ was a variety with high requirement for nitrogen and potassium.

Key words: Fluvo-aquic Soil, Peanut, Variety, Dry Matter Accumulation, Nutrient Requirement