| Effects of mixed sowing of different forage on soil texture and fertility |
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| DOI：10.7606/j.issn81000-7601.2020.03.30 |
| Key Words: bean grass gramineae mixed seeding soil effective nutrients soil physical structure |
| Author Name | Affiliation | | HUO Yayuan | Key Laboratory of Arid Habitat Crop Science, Lanzhou, Gansu 730070, China
College of Agriculture, Gansu Agricultural University,Lanzhou,Gansu 730070, China | | CAO Hong | College of Agriculture, Gansu Agricultural University,Lanzhou,Gansu 730070, China
College of Agriculture and Forestry,Longdong University, Qingyang, Gansu 745000,China | | CHAI Shouxi | Key Laboratory of Arid Habitat Crop Science, Lanzhou, Gansu 730070, China
College of Agriculture, Gansu Agricultural University,Lanzhou,Gansu 730070, China | | ZHANG Shuqiang | College of Agriculture and Forestry,Longdong University, Qingyang, Gansu 745000,China |
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| Abstract: |
| In this paper, the effects of mixed planting patterns of different grasses on the physical structure of soil and the distribution and accumulation of available nutrients in soil were studied. The results showed that with different mixing ratio, most bean curd combinations with red bean grass and bromegrass bean curd ratio of 4∶6 and 3∶7 have better effect and 4∶6 ratio was the best mixed seeding method. Compared with bean unicast, the soil bulk density decreased by 7.25%, soil porosity and aggregate content increased by 8.14% and 13.56%, respectively, and soil organic matter, available nitrogen, available phosphorus and potassium contents increased by 23.1%, 20.1%, 77.2%, and 13.5% respectively; Compared with grass unicast, soil bulk density decreased by 9.86%, soil porosity and aggregate content increased by 10.81% and 13.45%, and soil organic matter, available nitrogen, available phosphorus and available potassium contents increased by 15.5%, 16.1%, 66.5% and 19.1%, respectively. The results of two factor analysis of variance indicated that the interaction effect of mixed seeding and mixed seeding and mixed seeding ratio were the main factors influencing the difference of soil nutrients. Therefore, different planting methods of mixed soybean and grass not only improved soil physical structure, which was beneficial to drought resistance and moisture conservation, but also improved the supply of soil organic matter, available nitrogen, available phosphorus and available potassium nutrients, which was of great significance to improve soil fertility. |
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