|Table of Contents|

Effects of Planting Soybean on the Balances of Soil Phosphorus and Potassium(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2012年06期
Page:
907-910
Research Field:
Publishing date:

Info

Title:
Effects of Planting Soybean on the Balances of Soil Phosphorus and Potassium
Author(s):
GUO Xin1; SONG Qiu-lai1; ZENG Xiang-liang2; GONG Zhen-ping1; MA Chun-mei1
1.College of Agriculture,Northeast Agricultural University,Harbin 150030,Heilongjiang；
2.Heilongjiang Province Economical Research Institute of State Farm,Harbin 150090,Heilongjiang,China
Keywords:
Soybean; Soil phosphorus; Soil potassium; Profit and loss; Straw returning
PACS:
S565.1
DOI:
10.3969/j.issn.1000-9841.2012.06.010
Abstract:
Five soybean cultivars were used to estimate the effects of planting soybean on profits and losses of soil phosphorus and potassium with or without straw returning by pot culture.Results showed 57.2%-70.1% of total phosphorus and 60.7%-74.7% of total potassium absorbed by plants were transported to seeds at mature stage.Under the fertilizer application level of diammonium phosphate 75-150 kg·ha-1 and potassium sulfate 40-120 kg·ha-1，the phosphorus of soil was profit at all levels of P-fertilizer,and the potassium of soil was loss at low level of K-fertilizer and was profit at high level.The average profits and losses of soil phosphorus and potassium were 7.1-22.1 kg·ha-1 and -7.6-25.6 kg·ha-1 with straw returning,and were 6.0-21.0 kg·ha-1 and -14.3-18.9 kg·ha-1 without straw returning,respectively.To balance the profits and losses of soil phosphorus and potassium,the critical amounts of phosphate and potash fertilizers were as follows:P2O5 and K2O were 18.4 kg·ha-1 and 29.2 kg·ha-1 for straw returning,and 20.9 kg·ha-1 and 37.3 kg·ha-1for no straw returning treatments,respectively.Optimizing the quantity of fertilizer and returning the soybean straw would reach the basic balances and reduce the losses of soil phosphorus and potassium in soybean field.

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Last Update: 2014-08-19