| dc.creator | Xu,Jikun | |
| dc.creator | Yu,Zhenwen | |
| dc.creator | Shi,Yu | |
| dc.creator | Guo,Peiwu | |
| dc.creator | Wang,Yuqiu | |
| dc.date | 2017-01-01 | |
| dc.date.accessioned | 2019-04-24T21:20:30Z | |
| dc.date.available | 2019-04-24T21:20:30Z | |
| dc.identifier | https://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0718-58392017000400346 | |
| dc.identifier.uri | http://revistaschilenas.uchile.cl/handle/2250/56314 | |
| dc.description | ABSTRACT Water resource scarcity has been increasingly becoming a threat to wheat (Triticum aestivum L.) production in North China Plain. Thus, a water-saving irrigation strategy should be urgently developed. We conducted a 2-yr field experiment to examine the effects of supplemental irrigation (SI) on the photosynthetic characteristics and water use efficiency (WUE) of wheat. This study employed two SI strategies: A quota SI using 60 mm water at jointing and anthesis stages (W1) and soil moisture testing SI (W2), which brings the target relative soil water content of 0-40 cm soil layer to 70% field capacity at jointing and anthesis stages. A non-irrigated treatment (W0) was used as control. Results showed that W2 significantly improved the water uptake in 80-160 cm soil layer compared with W1. Moreover, flag leaf photosynthetic rate, stomatal conductance, and transpiration 14-28 d after anthesis were highest in W2 successively followed by W1 and W0, and the difference was significant. Dry matter (DM) at maturity, DM accumulation post-anthesis and its contribution ratio to grain were significantly higher in W2 than in the other treatments. 13CO2 labeling results indicated that W2 promoted δ13C-photosynthate accumulation in grain. In 2012-2013 growing season, the grain yield increased by 56.05% and 5.74% and WUE increased by 26.17% and 6.34% in W2 compared with those in W0 and W1, respectively. In 2013-2014 growing season, the grain yield increased by 41.82% and 5.90% and WUE increased by 28.24% and 13.03% in W2 compared with those in W0 and W1, respectively. Therefore, W2 is a high-yield and water-saving treatment. | |
| dc.format | text/html | |
| dc.language | en | |
| dc.publisher | Instituto de Investigaciones Agropecuarias, INIA | |
| dc.relation | 10.4067/S0718-58392017000400346 | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.source | Chilean journal of agricultural research v.77 n.4 2017 | |
| dc.subject | Dry matter | |
| dc.subject | photosynthesis rate | |
| dc.subject | quota supplemental irrigation | |
| dc.subject | soil moisture testing supplemental irrigation | |
| dc.subject | Triticum aestivum. | |
| dc.title | Effect of different supplemental irrigation strategies on photosynthetic characteristics and water use efficiency of wheat | |
