Water use and soil nitrate nitrogen changes under supplemental irrigation with nitrogen application rate in wheat field

Wang, Xin; Yu, Shen; Guo, Zengjiang; Zhang, Yongli; Zhang, Yu

doi:10.1016/j.fcr.2015.07.021

Cited by 77 publications

(42 citation statements)

References 52 publications

(52 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It also enhances soil water consumption (Wang et al 2015). On the other hand, the increased N levels were found to increase the impurities (i.e., K, Na and α-amino N) and sugar loss (Mekdad 2015).…”

mentioning

confidence: 99%

Response of Beta vulgaris L. to nitrogen and micronutrients in dry environment

Mekdad¹,

Rady²

2016

PLANT SOIL ENVIRON

View full text Add to dashboard Cite

Soils in dry environments, including Egypt, have low fertility and poor structure. To enhance soil fertility and crop performance, management technologies such as plant nutrition and suitable cultivars are needed for such environments. To investigate the yield performance under such conditions, two field trials were conducted using two Beta vulgaris cultivars (Amina -V 1 ; BTS 301 -V 2 ), two nitrogen levels (N 1 -200; N 2 -350 kg N/ha) and two micronutrient mixtures (M 1 -Fe + Zn + Mn; M 2 -tap water). Results indicated that growth and yields and their qualities were positively (P ≤ 0.05 and/or P ≤ 0.01) affected by all factors singly or in various interactions. The best yield performance was obtained with the trilateral interaction application of V 2 × N 2 × M 1 . Correlation analysis revealed presence of highly significant r values between white sugar yield and root yield.

show abstract

mentioning

confidence: 99%

Response of Beta vulgaris L. to nitrogen and micronutrients in dry environment

Mekdad¹,

Rady²

2016

PLANT SOIL ENVIRON

View full text Add to dashboard Cite

show abstract

“…When readings dropped to the desired value, the plots were irrigated with a water meter. The amount of supplemental irrigation (SI) was calculated according to the following equations (Wang, Shi, Guo, Zhang, & Yu, ):

SI = 10 \times γ_{normalbd} \times D_{normalh} \times false(θ_{t} - θ_{n} false)

where SI (mm) is the amount of supplemental irrigation; γ bd (g/cm 3 ) is the soil bulk density; D h (cm) is the depth of the soil layer (it is 30 cm in the present paper); θ t (%) is the target soil water content (SWC) on a weight basis after SI; θ n (%) is the soil water content (SWC) on a weight basis before SI. The value for θ t was calculated as follows:

θ_{normalt} = θ_{truemax} \times θ_{normaltr}

where θ max (%) is the field capacity (FC), and θ tr (%) is the target relative SWC for each tested soil as the experimental design.…”

Section: Methodsmentioning

confidence: 99%

Identification of plant hormones and candidate hub genes regulating flag leaf senescence in wheat response to water deficit stress at the grain‐filling stage

et al. 2019

View full text Add to dashboard Cite

In order to clarify the transcriptional regulatory network and physiological mechanisms governing leaf senescence response to drought stress in wheat, experiments were performed using two wheat varieties with contrasting drought tolerance: Fu287 (F287, a drought‐sensitive genotype) and Shannong20 (SN20, a drought‐resistant genotype). The latter has higher SPAD values, salicylic acid (SA), jasmonic acid (JA), zeatin (Z), zeatin riboside (ZR), and gibberellin (GA3) content as well as higher expression levels of Cu/Zn‐SOD, Mn‐SOD, Fe‐SOD, POD, CAT, and APX under various water deficit conditions. Conjoint analysis of physiological and biochemical indicators and transcriptome data by weighted gene co‐expression network analysis (WGCNA) in the present study provides a useful genomic and molecular resource for studying drought adaptation in wheat. The flag leaf senescence process was changed by altering the concentration of phytohormones. SA, JA, abscisic acid (ABA), Z, ZR, and GA3 coordinate with each other to control leaf senescence and plant adaptation under drought stress. Further, the leaf senescence process was divided into two phases: the persistence phase and the rapid loss phase. Shorter Chltotal (duration of the flag leaf being photosynthetically active), shorter Chlper (persistence phase), reduced M (inflection point cumulative temperature when senescence rate is the maximum), decreased rmax (the maximum senescence rate), larger r0 (the initial senescence rate), and increased raver (the average senescence rate) were slightly associated with low grain mass. We speculated that extending the period of the persistence phase by cultivation or chemical control measures could further increase the drought survivability and productivity of wheat.

show abstract

“…Yang Xiao and other studies have shown that after waste water irrigation, the majority of nutrients was absorbed by colloids and enriched in the topsoil [16][17][18][19][20], so the total soil nutrient content distribution trend with increasing soil depth decreases [26][27], Li Fayong's studies also have shown, 10cm and 20cm nitrate nitrogen content to be significantly higher than fresh water, indicating that saline water could improve surface-soil nitrate nitrogen [28], and Qian Juju's research showed that water quality conditions in different ,the soil surface N03-N peak changes as followed: water> dilute the sewage> recycling water> water. Huang Guanhua had got the similar conclusions.…”

Section: Discussionmentioning

confidence: 99%