Irrigation and nitrogen fertilizer application are two important factors affecting yield loss in rice fields; however, the interaction effects of different irrigation schedules combined management on fields remain unknown. Therefore, we collected 327 sets data 437 from 2000 to 2021 investigated water-saving schedules, levels, water-nitrogen couplings yield, use efficiency, (N2O emissions, runoff, leaching, ammonia volatilization) by meta-analysis using conventional flooding no treatment as...

In arid regions, irrigation scheduling optimization is efficient in coping with the shortage of agricultural water resources. This paper developed a simulation–optimization model for main crop an oasis, aiming to maximize yield and minimize consumption. The integrated soil balance simulation scheduling. was firstly calibrated validated based on field experiment data maize 2012 2013, respectively. Then, considering distribution types districts study area, used solve optimal schedules...

ABSTRACT Water‐saving irrigation and controlled drainage have been separately practised in many countries to increase water use efficiency reduce non‐point source pollution while maintaining crop yields. In a two‐year field experiment the Gaoyou Irrigation District of South China, use, yield, loads were monitored an integrated water‐saving (WSI‐CD) system unregulated system. For both 2007 2008, productivity (WP I ) gross G WSI‐CD 45.3 31.6% higher than those While evapotranspiration ET was...

Shortages of water resources and labor make it urgent to improve irrigation efficiency automation. To respond this need, study demonstrates the development an adaptive border system. The inflow is adjusted based on functional relationship between advance time deviation optimal adjustment rate, thereby avoiding real-time calculation infiltration parameters required by traditional control systems. During process, rate automatically only observation points. proposed system greatly simplifies...

Insufficient water resources restrict wheat production in the North China Plain, so it is urgent and essential to improve border irrigation performance use efficiency. This study developed a predesigned varied-discharge scheme closed-ended border. Field treatments, including continuous-discharge (CD), increased-discharge (ID) decreased-discharge (DD) tests, were conducted evaluate of proposed scheme. The DD treatment had great application efficiency (AE), distribution uniformity (DU)...

A suitable irrigation method adopted to arid desert conditions, including a special soil structure and specialized plants, has been continuously studied improved. field study was conducted in the Awei area of Aletai Xinjiang 2015 2016 investigate applicability shallow subsurface drip (SSDI) an area. completely randomized block design with three replications treatments for tape depths at 5, 10, 20 cm established. The results indicated that vertical distribution moisture (SDI, buried depth cm)...

The considerably high evapotranspiration and the low leaching fraction of soil in arid regions are likely primary causes enhanced salinity such regions. Winter irrigation has proven to be very effective for promoting salts from rooting-zone. In this study, we investigated effects different methods (flood drip irrigation) winter quotas (450, 1350, 2250, 3150, 4050, 4950 m3/hm2) on plant growth an region. sum ECe 0–100 cm layer was 56.26–29.32 ms/cm under flood irrigation, 61.37–17.90 64.13 no...

Saline groundwater irrigation is an important way to alleviate the shortage of fresh water resources. In order find a reasonable saline method for farmland, experiment was conducted with and at seedling, jointing, heading, filling stages. The soil salinity, growth, chlorophyll fluorescence, yield summer maize were measured. results showed that alternating led smaller increase in salinity relative alone. addition, different sequences also significantly affected accumulation salinity. maximum...

Soil is an important element in the agricultural domain because it serves as media that bridges water consumption and supply processes. In this study, a neural network ensemble (NNE) method was employed to predict soil moisture eliminate effects of random initial parameters (NN) on model accuracy. The constructed NNE predicts daily root zone continuously for whole crop growing season processes were separately modeled. profile divided into multiple layers modeled separately. Weather data...

The zero-inertia model is widely used for simulating surface flow in irrigation systems. This accurate when inflow discharge constant. However, simulation of systems with rapidly varied needed due to the development real time control technology. Hence, objective this study validate discharge. For purpose, twenty-three border tests at a range changes on different field slopes and roughness coefficients were conducted. Then, sensitivity analyses bed slope, infiltration parameters, coefficient...

Regulated deficit irrigation (RDI) was applied to gray jujube trees in an oasis region, determine the effects of this system on soil salinity, physiological processes, fruit yield, and quality. Treatments consisted severe, moderate low (irrigated with 85%, 70% 55% CK, respectively) at flowering stage set stage. During other growth stages, all treatments were irrigated 80% pan evaporation, which same as that control. The results indicated salinity enhanced during periods water stress, but...