Key Laboratory of Land Information in Sichuan Province

Yaan, China

Key Laboratory of Land Information in Sichuan Province

Yaan, China
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Huang C.,Sichuan Agricultural University | Huang C.,Key Laboratory of Land Information in Sichuan Province | Deng L.,Sichuan Agricultural University | Deng L.,Key Laboratory of Land Information in Sichuan Province | And 8 more authors.
Soil and Tillage Research | Year: 2010

In the Peoples Republic of China, more than 4 Mt of fungal residues needs to be treated yearly. To investigate the effect of Agaricus bisporus residues return on soil fertility, this study compared the effects of five treatments on soil nutrients, soil enzymatic activities, N use efficiency and crop yields in a paddy soil under a rice-wheat rotation. Five treatments were designed including application of chemical fertilizer only (CF), a combined application of 30% fungal residues and 70% chemical fertilizer with the ratio of total N in the fungal residues to that in CF being 0.3:1 (30%FR), a combined application of 70% fungal residues and 30% chemical fertilizer with the ratio of total N in the fungal residues to that in CF being 0.7:1 (70%FR), a full dose of fungal residues return only with the ratio of total N in fungal residues to that in CF being 1:1 (100%FR), and a full return of fungal residues only with the ratio of total N in fungal residues to that in CF being 1.5:1 (150%FR). We found that the content of soil nutrients and soil enzymatic activities in the same treatment were higher at VGS (vegetative growth stage) than at RGS (reproductive growth stage) in rice and wheat seasons. 100%FR and 150%FR treatments had higher level of soil organic matter, available N, P, K, invertase, urease, neutral-phosphatase, catalase, N use efficiency and crop yields than CF treatment. These results indicated that A. bisporus residues return could positively affect soil nutrients, soil enzymatic activities, N use efficiency and crop yields as organic manure in a paddy soil. The information obtained will be helpful to more rational utilization of fungal residues. © 2010 Elsevier B.V.

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