| Effects of different mulch modes on apple photosynthesis in dry-land orchards of east Gansu Province |
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| DOI：10.7606/j.issn.1000-7601.2013.03.04 |
| Key Words: cover mode ‘Fuji’apple photosynthesis economic benefit |
| Author Name | Affiliation | | SUN Wentai | Institute of Forestry, Fruits and Floriculture, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | ZHAO Mingxin | Institute of Forestry, Fruits and Floriculture, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | YIN Xiaoning | Institute of Forestry, Fruits and Floriculture, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | DONG Tie | Institute of Forestry, Fruits and Floriculture, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | LIU Xinglu | Institute of Forestry, Fruits and Floriculture, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | NIU Junqiang | Institute of Forestry, Fruits and Floriculture, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | MA Ming | Institute of Forestry, Fruits and Floriculture, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China |
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| Abstract: |
| In order to select the proper soil tillage model for apple orchard in dry highland of Longdong, different surface mulch modes were tested on twenty-years old‘Fuji’apple. The photosynthetic characters of apple trees in different modes were analyzed, and economic efficiency was compared also. The results showed that diurnal changes of photo-synthetic rate(Pn)presented double-peak curve in elean tillage treatment(F4). The diumal changes of photosynthetic rate(Pn)in film mulch, straw mulch, and gravel muleh showed one-peak curve. The highest net photosynthetic rate gained in grass cover mode, peaked at 10:00 am. Water use efficiency(WUE)was significantly inereased(P<0.01) as well. Photosynthetic rate(Pn)was significantly positively correlated with
atmospheric relative humidity(RH), and was significantly negatively correlated with air temperature(Ta) and leaf temperature(Tl). There was significant posi-tive correlation between transpiration rate(Tr) and air temperature(Ta)and leaf temperature(Tl). After covered with straw, LCP was significantly decreased but LSP was increased.Pnmax in straw cover
mode was greater than in CK. CCP in straw cover mode was significantly lower than in F1、F3 and F4. The economie analysis showed that film mulch mode had high income to cost ratio. In conclusion, in dry land orchard, straw cover and film mulch significantly increased photosynthesis and the yield of ‘Fuji’apple, enhanced the dry matter formation, and improved light and CO2 utilization capacity of apple trees. |
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