On-farm evaluation of an in-season nitrogen management strategy based on soil Nmin test

Cui, Zhenling; Zhang, Fusuo; Chen, Xinping; Miao, Yuxin; Li, Junliang; Shi, Liwei; Xu, Jiufei; Ye, Youliang; Liu, Chunsheng; Yang, Zhongling; Qiang, Zhang; Huang, Shaomin; Bao, Dejun

doi:10.1016/j.fcr.2007.07.008

Cited by 235 publications

(180 citation statements)

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“…Furthermore, the type of fertilizers and the timing and methods of top-dressing also affect N use efficiency [56,57]. Most of the farmers broadcast urea fertilizer at the elongation stage (V6) of summer maize, but an N top-dressing should be applied during the middle-late growing season (V10-12) in this region [58,59]. Also, an in-season N management strategy based on soil mineral nitrogen (N min ) testing can save 40% N fertilizer without yield losses [58].…”

Section: Effects Of Plant Density and N Application On Yield And Pfp Nmentioning

confidence: 99%

“…Most of the farmers broadcast urea fertilizer at the elongation stage (V6) of summer maize, but an N top-dressing should be applied during the middle-late growing season (V10-12) in this region [58,59]. Also, an in-season N management strategy based on soil mineral nitrogen (N min ) testing can save 40% N fertilizer without yield losses [58]. Unfortunately, smallholder farmers usually decide the amount of top-dressing based on their experience or the salesperson's suggestions, rather than researching and testing the soil nutrients and plant growth.…”

Section: Effects Of Plant Density and N Application On Yield And Pfp Nmentioning

confidence: 99%

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Factors Affecting Nitrogen Use Efficiency and Grain Yield of Summer Maize on Smallholder Farms in the North China Plain

et al. 2018

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Abstract:The summer maize yields and partial factor productivity of nitrogen (N) fertilizer (PFP N , grain yield per unit N fertilizer) on smallholder farms in China are low, and differ between farms due to complex, sub-optimal management practices. We collected data on management practices and yields from smallholder farms in three major summer maize-producing sites-Laoling, Quzhou and Xushui-in the North China Plain (NCP) for two growing seasons, during 2015-2016. Boundary line analysis and a Proc Mixed Model were used to evaluate the contribution of individual factors and their interactions. Summer maize grain yields and PFP N ranged from 6.6 t ha −1 to 14.2 t ha −1 and 15.4 kg kg −1 to 96.1 kg kg −1 , respectively, and averaged 10.5 t ha −1 and 49.1 kg kg −1 , respectively. The mean total yield gap and PFP N gap were 3.6 t ha −1 and 43.3 kg kg −1 in Laoling, 2.2 t ha −1 and 24.5 kg kg −1 in Xushui, and 2.8 t ha −1 and 41.1 kg kg −1 in Quzhou. A positive correlation was observed between the yield gap and PFP N gap; the PFP N gap could be reduced by 6.0 kg kg −1 (3.6-6.6 kg kg −1 ) by reducing the yield gap by 1 t ha −1 . The high yield and high PFP N (HH) fields had a higher plant density and lower N fertilization rate than the low yield and low PFP N (LL) fields. Our results show that multiple management factors caused the yield gap, but the relative contribution of plant density is slightly higher than that of other management practices, such as N input, the sowing date, and potassium fertilizer input. The low PFP N was mainly attributed to an over-application of N fertilizer. To enhance the sustainable production of summer maize, the production gaps should be tackled through programs that guide smallholder farmers on the adoption of optimal management practices.

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Section: Effects Of Plant Density and N Application On Yield And Pfp Nmentioning

confidence: 99%

Section: Effects Of Plant Density and N Application On Yield And Pfp Nmentioning

confidence: 99%

Factors Affecting Nitrogen Use Efficiency and Grain Yield of Summer Maize on Smallholder Farms in the North China Plain

et al. 2018

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“…the TNR using expression (6) with other three methods commonly used worldwide, namely soil nitrate testing (NIT) Cui et al, 2008aCui et al, ,b, 2010b, balance calculation (BAL) and conventional rate used locally. Five treatments were devised and the methods for calculating fertilizer N rate shown in Table 1.…”

Section: Comparing Four Approaches For Determining Fertilizer N Ratementioning

confidence: 99%

“…This method has been well established in wheat/maize rotations in recent years Cui et al, 2008aCui et al, ,b, 2010b. From the results of three wheat seasons (Table 2), the total amount of N fertilizer application of the three recommendation methods (i.e.…”

Section: Comparing Four Approaches For Determining Fertilizer N Ratementioning

confidence: 99%

“…So far no good practical index has been found to reflect the soil N supply in waterlogged rice fields (Zhu and Chen, 2002). Although the storage of nitrate in the soil profile of the crop root zone can be used as an index in upland cropping systems Mengel et al, 2006;Cui et al, 2008aCui et al, ,b, 2010a, this also presents problems such as large spatial and temporal variation in soil nitrate and strong movement and large errors during sampling and measurement of soil nitrate. There is also the problem of converting the soil test data into a fertilizer N application rate.…”

Section: Introductionmentioning

confidence: 99%

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Calculation of theoretical nitrogen rate for simple nitrogen recommendations in intensive cropping systems: A case study on the North China Plain

Christie

2011

Field Crops Research

105

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Interplay Between Root Structure and Function in Enhancing Efficiency of Nitrogen and Phosphorus Acquisition

Shen

Wang

et al. 2021

The Root Systems in Sustainable Agricultural Intensification

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On-farm evaluation of an in-season nitrogen management strategy based on soil Nmin test

Cited by 235 publications

References 32 publications

Factors Affecting Nitrogen Use Efficiency and Grain Yield of Summer Maize on Smallholder Farms in the North China Plain

Factors Affecting Nitrogen Use Efficiency and Grain Yield of Summer Maize on Smallholder Farms in the North China Plain

Calculation of theoretical nitrogen rate for simple nitrogen recommendations in intensive cropping systems: A case study on the North China Plain

Interplay Between Root Structure and Function in Enhancing Efficiency of Nitrogen and Phosphorus Acquisition

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