Abstract: In order to determine the suitable soil bulk density for peanut growth and development,and explore the effect mechanism of soil bulk density on peanut growth,the purpose was to provide basis for the establishment of high yield cultivation system for peanut.Using the method of column planted,setting the 0-20 cm and 21-40 cm soil bulk density with 6 treatments to simulate the actual conditions of bulk density in different soil layers,just as 1.2 and 1.3,1.2 and 1.4,1.2 and 1.5,1.3 and 1.3,1.3 and 1.4,1.3 and 1.5 g/cm³,respectively,the effects of soil bulk density on the uptake and distribution of nitrogen,phosphorus,potassium and calcium in peanut pods were studied.The results showed that the contents of nitrogen,phosphorus,potassium and calcium in peanut stem,leaf,root,nut,fruit shell and fruit needle,biomass yield,were decreased with the increased of soil bulk density in 21-40 cm soil layer under the same soil bulk density of 0-20 cm soil layer.In the 21-40 cm soil bulk density under the same conditions,0-20 cm soil bulk density of 1.2,1.3 g/cm³ of peanut stem,leaf,root,fruit shell,nut and fruit needle,biomass yield,nitrogen,phosphorus,potassium,the total biological yield of each organ were as follows:T33 > T23 > T34 > T24 > T35 > T25,calcium content and accumulation mutual high and low,the difference was not significant.The content and accumulation of nitrogen,phosphorus,potassium,calcium in different organs were different.The nitrogen content was root > nut > leaf > fruit needle > fruit shell > stem,and phosphorus content was root > nut > fruit shell > fruit needle > leaf > stem,the potassium content was root > fruit shell > stem > nut > fruit needle > leaf,calcium content was leaf > nut > fruit needles > fruit shell > stem > nut;nitrogen accumulation was leaf > nut > fruit shell > stem > root > fruit needle,phosphorus accumulation was leaf > nut > stem > fruit shell > root > fruit needle,potassium(K) accumulation was leaf > stem > fruit shell > nut > root > fruit needle,calcium accumulation was leaf > fruit shell > stem > nut > root > fruit needle.The effects of soil bulk density on the uptake and accumulation of nitrogen,phosphorus,potassium and calcium in peanut were different.Soil bulk density combinations of 0-20 cm and 21-40 cm had interactive effects on the accumulation of N,P,K and Ca.The soil bulk density which is beneficial to peanut absorption and accumulation of mineral nutrient elements is 0-20 cm,and the soil bulk density is 1.2-1.3 g/cm³ and 21-40 cm,the soil bulk density is about 1.3 g/cm³.

Key words: Peanut, Soil bulk density, Pod bearing period, Nutrient accumulation, Distribution

CLC Number: 

• S143