| Effects of wheat straw-mulching on soil moisture and soil temperature and tree growth in apple orchard |
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| DOI：10.7606/j.issn.1000-7601.2017.01.07 |
| Key Words: wheat straw mulching amount soil moisture soil temperature tree growth input and output ratio |
| Author Name | Affiliation | | YIN Xiao-ning | Institute of Fruit and Floriculture Research，Gansu Academy of Agricultural Science, Lanzhou, Gansu 730070, China | | MA Ming | Institute of Fruit and Floriculture Research，Gansu Academy of Agricultural Science, Lanzhou, Gansu 730070, China | | LIU Xin-lu | Institute of Fruit and Floriculture Research，Gansu Academy of Agricultural Science, Lanzhou, Gansu 730070, China | | DONG Tie | Institute of Fruit and Floriculture Research，Gansu Academy of Agricultural Science, Lanzhou, Gansu 730070, China | | NIU Jun-qiang | Institute of Fruit and Floriculture Research，Gansu Academy of Agricultural Science, Lanzhou, Gansu 730070, China | | SUN Wen-tai | Institute of Fruit and Floriculture Research，Gansu Academy of Agricultural Science, Lanzhou, Gansu 730070, China | | ZHANG Kun | Institute of Fruit and Floriculture Research，Gansu Academy of Agricultural Science, Lanzhou, Gansu 730070, China |
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| Abstract: |
| The wheat straw mulching with different amounts (22 000 kg·hm-2(T1), 33 000 kg·hm-2(T2) and 44 000 kg·hm-2(T3)) and clean tillage(CK) were used in orchards to study its influence on the soil moisture in 0～100 cm soil depth, the soil temperature in 5～25 cm soil depth, tree growth and fruit quality during the whole growth period of 19-year-old Nagafu No.2 tree. Results showed that from April to July the average soil moisture in the depth of 0～100 cm of corresponding three treatments increased with the increase of wheat straw amounts; the average moisture contents of T2 and T3 were significantly (P<0.01) higher than that of CK in same period, increased by 8.98%～27.09%, and the soil moisture contents in 0～20 cm and 20～40 cm two soil layers of three wheat straw mulching treatments were also significantly (P<0.01) higher than that of CK in the same soil layer, increased by 9.36%～73.77%. From April to August the soil temperature in 5～25 cm soil depth in three wheat straw mulching treatments was lower than that in CK, significantly (P<0.01) from April to June, decreased by 2.11℃～8.02℃. But it was higher than that in CK from September to November. Daily amplitude in 5～20 cm soil depth in wheat straw mulching treatments was very significantly (P<0.01) lower than that in CK, decreased by 0.39℃～3.63℃. The single fruit weight and yield of T2 were all the highest in four treatments, the yields of three wheat straw mulching treatments were significantly (P<0.01) higher than CK, increased by 10.70%～20.83%. Water use efficiency of fresh yield of wheat straw mulching treatments was significantly (P<0.01) higher than CK, increased by 9.87%～20.87%. Wheat straw mulching treatments had little effect on tree growth and shoot ratio. In view of comprehensive effects and input and output ratio, it was suitable for apple orchard to apply wheat straw mulching with 22 000～33 000 kg·hm-2 in this area. |
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