Key Laboratory for Crop Water Requirement and Regulation of Ministry of Agriculture

Xinxiang, China

Key Laboratory for Crop Water Requirement and Regulation of Ministry of Agriculture

Xinxiang, China
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Li Q.,Key Laboratory for Crop Water Requirement and Regulation of Ministry of Agriculture | Li Q.,Shandong Agricultural University | Shen J.,Shandong Agricultural University | Zhao D.,Shandong Agricultural University
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2011

In order to investigate the optimal water-saving and high-efficient irrigation pattern of winter wheat in North China, 3 irrigation treatments, irrigating 120 mm only at jointing stage, irrigating 60 mm each at jointing and heading stages, and irrigating 40 mm each at jointing, heading, and milking stages were conducted to study the effect of irrigation frequency on yield and leaf water use efficiency of winter wheat in Huabei Plain of North China. The results showed that under the condition of irrigating 120 mm during the growing season of winter wheat, the treatment which irrigated 60 mm at jointing and heading stages, respectively, the net photosynthesis rate and transpiration rate of winter wheat flag leaves significantly increased at milky stage and dough stage. With irrigating 60 mm at jointing and heading stages, respectively, the water use efficiency in flag leaves was significantly improved at milky and dough stages. The results indicated that irrigating 60 mm at jointing and heading stages during the winter wheat growing season, grain yield was the highest, which can be attributed to increased spike number. Under the condition of irrigation amount 120 mm at the growing season of winter wheat in North China, it was suggest that winter wheat should be irrigated 60 mm at jointing and heading stages to achieve reasonable water use efficiency and grain yield.


Li C.,Chinese Academy of Agricultural Sciences | Li C.,Key Laboratory for Crop Water Requirement and Regulation of Ministry of Agriculture | Zhou X.,Chinese Academy of Agricultural Sciences | Sun J.,Chinese Academy of Agricultural Sciences | And 2 more authors.
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2014

Stomatal regulation plays a pivotal role in the adaption of plants to different water conditions. In order to understand characteristics of stomatal resistance of crops with different irrigation methods, differences in leaf stomatal resistance and contribution of stomatal aperture to water vapor transfer were investigated with a field experiment conducted under alternative deficit water supply and under conventional furrow irrigation. Results indicated that for individual maize leaf, regardless of irrigation methods, the stomatal resistance decreased gradually from the base to the tip of the maize leaf. At the population level, the stomatal resistance of maize leaf increased gradually from canopy top to bottom. For the change of the leaf stomatal resistance in time, diurnal variation of leaf stomatal resistance was in a W shape. Diurnal and daily changes in the leaf stomatal resistance in the upper canopy were relatively small. The upper surface of maize leaf contributed more to CO2 and water vapor transfer than the ones underside. Except at the seedling stage, the leaves in the upper and middle part of maize canopy contributed more than 80% of the total CO2 and water vapor. Stomatal resistances of maize leaves decreased with the increase in leaf age during the vegetative growth stage. Differences in stomatal resistance among maize leaves of different ages were increased by the alternative deficit water supply. During the reproductive growth phase, leaf age had no significant influence on the stomatal resistance in matured leaves. Compared with the conventional furrow irrigation with sufficient water supply, the alternative deficit water supply increased the ratio of the stomatal resistances between the upper side and underside of maize leaves. The vertical gradient of stomatal resistance from canopy top to bottom increased significantly (P<0.05), decreasing leaf stomatal conductivity rapidly, and improving the contribution of the stomatal aperture in the upper canopy to water vapor transfer. Therefore, the leaf stomatal resistance of maize was regulated by furrow irrigation methods and soil water condition, and it was affected by the leaf age, leaf area index and natural feature of stomatal aperture. The study is useful for controllable irrigation technology and water vapor cycle in soil plant atmosphere continuum (SPAC).


Han H.,Key Laboratory for Crop Water Requirement and Regulation of Ministry of Agriculture | Han H.,Shandong Agricultural University | Zhao D.,Shandong Agricultural University | Shen J.,Shandong Agricultural University | And 4 more authors.
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2013

The limited water resources in the North China Plain have compelled the farming community to implement water-saving measures. In order to discuss saving-water planting pattern of winter wheat in the North China Plain during 2010-2011 winter wheat growing season at the Agronomy Station of Shandong Agricultural University. A split-plot design was applied with 2 planting patterns, i.e., wide-precision planting pattern and conventional-cultivation planting pattern, in the main plots, and 3 different irrigation regimes, i.e., 60 mm irrigated at jointing and heading stages, irrigated 60 mm only at jointing stage, and non-irrigation in the whole growing season, to study the effects of planting pattern and irrigation on grain yield and yield components, protein yield, protein content, gluten index, wet gluten content, sedimentation volumes, water absorption, dough development time, and dough stability time, etc. The results showed that wide-precision planting pattern significantly increased winter wheat grain yield, which was attributed to increasing spike numbers significantly. Under the conditions of irrigated 60 mm each at jointing and heading stages, the increase production potential in wide-precision planting pattern was much better than that in conventional-cultivation planting pattern. Conventional-cultivation planting pattern increased grain protein content; however, no matter irrigated 60 mm only at jointing stage or irrigated 60 mm each at jointing and heading stages, the protein yield in wide-precision planting pattern was much higher than that in conventional-cultivation planting pattern. 60 mm irrigated each at jointing and heading stages in wide-precision planting pattern, the gluten index and wet gluten content were significantly higher than those in non-irrigation or only irrigated 60 mm at jointing stage; however, 60 mm irrigated each at jointing and heading stages in conventional-cultivation planting pattern, the gluten index and wet gluten content were significantly lower than those in non-irrigation or only 60 mm irrigated at jointing stage. 60 mm irrigated each at jointing and heading stages in wide-precision planting pattern, the sedimentation volumes was significantly lower than those in non-irrigation or irrigated 60 mm only at jointing stage; hence, under deficit irrigation conditions, wide-precision planting pattern could improve processing quality of winter wheat grain yield. Compared with conventional-cultivation planting pattern, wide-precision planting which irrigated 60 mm each at jointing and heading stages significantly increased water absorption. The results indicated that 60 mm irrigated each at jointing and heading stages in wide-precision planting pattern achieved reasonable winter wheat grain yield and yield quality; hence, in the North China Plain, application of conventional-cultivation planting pattern should be restricted. Instead, wide-precision planting pattern should be used in combination with deficit irrigation to increase winter wheat grain yield and improve yield quality. The study could provide theoretical basis and technical support for water-saving agriculture and high yield and high quality winter wheat cultivation in the North China Plain.

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