Plant Soil Environ., 2013, 59(6):280-286 | DOI: 10.17221/846/2012-PSE

Long-term effects of returning wheat straw to croplands on soil compaction and nutrient availability under conventional tillage

Z. Guo1,2, D.Z. Wang1,2
1 Soiland Fertilizer Research Institute, Anhui Academy of Agricultural Sciences, Hefei, Anhui, P.R. China
2 Key Laboratory of Nutrient Cycling and Resources Environment of AnHui Province,

To investigate the effects of returning wheat straw to croplands on soil compaction and nutrient availability, this trial was designed: (1) planted crops without fertilization (NF); (2) natural land without human activities (CT); (3) applied mineral fertilizers in combination with 7500 kg/ha wheat straw (WS-NPK); (4) applied mineral fertilizers in combination with 3750 kg/ha wheat straw (1/2WS-NPK); and (5) applied mineral fertilizers alone (NPK). It is found that, compared with NPK, the soil bulk density in 1/2WS-NPK and WS-NPK both decreased by more than 10% in the 0 cm to 15 cm layer, and by 6.93% and 9.14% in the 15 cm to 20 cm, respectively. Furthermore, in contrast to NPK, the soil available nitrogen in the 0 cm to 25 cm layer in 1/2WS-NPK and WS-NPK were higher by 17.43% and 35.19%, and the soil available potassium were higher by 7.66% and 17.47%, respectively. For soil available phosphorus in the depth of 5 cm to 25 cm, it was higher by 18.51% in 1/2WS-NPK and by 56.97% in WS-NPK, respectively. Therefore, returning wheat straw to croplands effectively improves soil compaction and nutrients availability, and the improvement in soil nitrogen and phosphorus availability is closely related to the amount of wheat straw.

Keywords: soil organic matter; soil bulk density; soil nitrogen; soil phosphorus; soil water content

Published: June 30, 2013  Show citation

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Guo Z, Wang DZ. Long-term effects of returning wheat straw to croplands on soil compaction and nutrient availability under conventional tillage. Plant Soil Environ. 2013;59(6):280-286. doi: 10.17221/846/2012-PSE.
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