|Table of Contents|

Effects of Two Kinds of Conditioning Agents on Phosphorus Uptake and Transformation in Facility Phosphorus-rich Soils

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2020年08
Page:
87-92
Research Field:
Publishing date:

Info

Title:
Effects of Two Kinds of Conditioning Agents on Phosphorus Uptake and Transformation in Facility Phosphorus-rich Soils
Author(s):
WANG Xi; LU Shuchang
(College of Agronomy & Resources and Enviroment,Tianjin Agricultural University，Tianjin 300384)
Keywords:
humic acid; biochar; combined application; sweet sorghum forage; phosphorus; absorption and transformation
PACS:
-
DOI:
10.11937/bfyy.20193254
Abstract:
Sweet sorghum forage was used as the test crop，and humic acid and biochar were used as test materials.The test set up 7 treatments，namely blank treatment (T1)，1% (to siol weight ratio) biochar (T2)，0.06% humic acid (T3)，0.06% humic acid+1% biochar (T4)，0.06% humic acid+0.5% biochar (T5)，0.03% humic acid+1% biochar (T6) and 0.03% humic acid+0.5% biochar (T7).The effects of humic acid and biochar on phosphorus absorption and transformation in facility phosphorus-rich soils were studied，in order to improve the environmental problems caused by phosphorus accumulation in greenhouse farmland.The results showed that the amount of phosphorus absorbed by T6 treatment was significantly higher than that of other treatments，was 0.919 g?pot-1，which was 38.82% higher than the control.From the ratio of total phosphorus to inorganic phosphorus and organic phosphorus,the proportion of organic phosphorus in T5 treatment was the largest，which significantly reduced the content of Ca8-P，increased the content of Fe-P and O-P，and promoted the conversion of phosphorus to stable form.In addition，the phosphatase activity of T7 and T5 treatments were significantly improved，promoting the conversion of organic phosphorus to inorganic phosphorus in the soil.Therefore，T6 treatment was beneficial to the absorption of soil phosphorus in forage sweet sorghum.T5 treatment was beneficial to promote the transformation of phosphorus into a stable state and reduce the potential phosphorus environmental risk.

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Last Update: 2020-07-08