| Soil water and thermal effects of different mulching and planting methods and their influences on yield in dryland potato production |
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| DOI：10.7606/j.issn.1000-7601.2013.01.01 |
| Key Words: dryland potato mulching method water thermal effec
t yield |
| Author Name | Affiliation | | TANG Ying fang | Key Laboratory of Northwest Crop Drought resistant Farming, Ministry of Agricu
lture, Gansu Academy
of Agriculture Sciences，Lanzhou, Gansu 730070, China | | GAO Shi ming | Key Laboratory of Northwest Crop Drought resistant Farming, Ministry of Agricu
lture, Gansu Academy
of Agriculture Sciences，Lanzhou, Gansu 730070, China | | WANG Ya hong | Key Laboratory of Northwest Crop Drought resistant Farming, Ministry of Agricu
lture, Gansu Academy
of Agriculture Sciences，Lanzhou, Gansu 730070, China | | ZHANG Xu cheng | Key Laboratory of Northwest Crop Drought resistant Farming, Ministry of Agricu
lture, Gansu Academy
of Agriculture Sciences，Lanzhou, Gansu 730070, China |
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| Abstract: |
| Potato is the one of main crops in arid and semiarid areas of the Northwest Loes
s Plateau. How to increase the rainwater use efficiency of potato is the most
important issue for local potato-industry development, the field experiment inc
luded different mulching methods and furrow-ridge planting model as the treatme
nts The topsoil temperature, soil moisture and distribution, and crop yield were
investigated. The water consumption and water use efficiency were also calculat
ed to study the water-thermal effect of different planting models on potato yie
ld and water use efficiency in the Northwest Loess Plateau. The results showed t
hat as the dyadic mulching and furrow-ridge cultivating method were used, in wh
ich the furrow was covered by crop straw and the ridge was covered by plastic me
mbrane, the daily average soil temperature in the 0～25 cm profile increased by
0.5℃～2.23℃, and soil water storage increased by 52.8 mm in the 0～100 cm prof
ile, as compared with the traditional planting method (CK) for potato in early d
evelopmental stage. Additionally, the soil temperature and water storage did not
significantly differ from the plastic mulching treatment. In drought summer, fr
om the end of June to the middle of July, the daily average soil temperature in
0～25 cm profile under plastic-straw dyadic mulching and furrow-ridge cultivat
ing methods decreased by 3.6℃～6.9℃ as compared with plastic mulching treatmen
ts, only increased by 0.6℃～0.8℃ as compared with the CK. For the soil water s
torage in the 0～100 cm profile, it increased by 6.2～8.3 mm and 27.3 mm as comp
ared with the plastic mulching treatment and CK, respectively. Additionally, the
yield and water use efficiency increased by 8.39%～58.38% and 8.46%～67.97% res
pectively, as compared with the other treatments. Therefore, plastic-straw dyad
ic mulching and furrow ridge cultivating method could coordinate water and ther
mal effects on potato development, and increase potato yield and water use effic
iency in arid areas of the Northwest Loess Plateau. |
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