Effect of full substituting compound fertilizer with different organic manure on reactive nitrogen losses and crop productivity in intensive vegetable production system of China

2019 ◽  
Vol 243 ◽  
pp. 381-384 ◽  
Author(s):  
Minghao Zhuang ◽  
Shu Kee Lam ◽  
Jing Zhang ◽  
Hu Li ◽  
Nan Shan ◽  
...  
Keyword(s):  
Production System ◽  
Crop Productivity ◽  
Organic Manure ◽  
Nitrogen Losses ◽  
Reactive Nitrogen ◽  
Vegetable Production ◽  
Compound Fertilizer

The effects of controlled release urea on maize productivity and reactive nitrogen losses: A meta-analysis

2019 ◽  
Vol 246 ◽  
pp. 559-565 ◽  
Author(s):  
Wushuai Zhang ◽  
Zhengyuan Liang ◽  
Xiaoming He ◽  
Xiaozhong Wang ◽  
Xiaojun Shi ◽  
...  
Keyword(s):  
Controlled Release ◽  
Meta Analysis ◽  
Nitrogen Losses ◽  
Reactive Nitrogen ◽  
Maize Productivity ◽  
Controlled Release Urea

scholarly journals Surface lime and silicate application and crop production system effects on physical characteristics of a Brazilian Oxisol

Soil Research ◽  
2017 ◽  
Vol 55 (8) ◽  
pp. 778
Author(s):  
G. S. A. Castro ◽  
C. A. C. Crusciol ◽  
C. A. Rosolem ◽  
J. C. Calonego ◽  
K. R. Brye
Keyword(s):  
Physical Properties ◽  
Bulk Density ◽  
Production System ◽  
Crop Production ◽  
Management Practices ◽  
Production Systems ◽  
Crop Productivity ◽  
Soil Physical Properties ◽  
Physical Characteristics ◽  
Forage Crop

This work aimed to evaluate the effects of crop rotations and soil acidity amelioration on soil physical properties of an Oxisol (Rhodic Ferralsol or Red Ferrosol in the Australian Soil Classification) from October 2006 to September 2011 in Botucatu, SP, Brazil. Treatments consisted of four soybean (Glycine max)–maize (Zea mays)–rice (Oryza sativa) rotations that differed in their off-season crop, either a signal grass (Urochloa ruziziensis) forage crop, a second crop, a cover crop, or fallow. Two acid-neutralising materials, dolomitic lime (effective calcium carbonate equivalent (ECCE) = 90%) and calcium-magnesium silicate (ECCE = 80%), were surface applied to raise the soil’s base saturation to 70%. Selected soil physical characteristics were evaluated at three depths (0–0.1, 0.1–0.2, and 0.2–0.4 m). In the top 0.1 m, soil bulk density was lowest (P < 0.05) and macroporosity and aggregate stability index were greatest (P < 0.05) in the forage crop compared with all other production systems. Also, bulk density was lower (P < 0.05) and macroporosity was greater (P < 0.05) in the acid-neutralising-amended than the unamended control soil. In the 0.1–0.2-m interval, mean weight diameter and mean geometric diameter were greater (P < 0.05) in the forage crop compared with all other production systems. All soil properties evaluated in this study in the 0.2–0.4-m interval were unaffected by production system or soil amendment after five complete cropping cycles. Results of this study demonstrated that certain soil physical properties can be improved in a no-tillage soybean–maize–rice rotation using a forage crop in the off-season and with the addition of acid-neutralising soil amendments. Any soil and crop management practices that improve soil physical properties will likely contribute to sustaining long-term soil and crop productivity in areas with highly weathered, organic matter-depleted, acidic Oxisols.

Drip irrigation affects N2O emission differently depending on soil moisture status in an intensive vegetable production system

2021 ◽  
Author(s):  
Xiuchun Xu ◽  
Di Wu ◽  
Wei Zhang ◽  
Bang Ni ◽  
Xuan Yang ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Drip Irrigation ◽  
Production System ◽  
Nitrate Content ◽  
Site Preference ◽  
Vegetable Production ◽  
Flood Irrigation ◽  
Tomato Production ◽  
Production Region ◽  
Soil Moisture Status

&lt;p&gt;Plastic-shed vegetable production system is becoming the main type of vegetable production in China, while excessive irrigation and fertilization input lead to significant N loss by leaching, runoff, and gaseous N. The current study established a field experiment to investigate the effects of drip irrigation and optimized fertilization on vegetable yield, water and fertilizer efficiencies and N&lt;sub&gt;2&lt;/sub&gt;O emission in a typical intensive plastic-shed tomato production region of China. The treatments include CK (no fertilization, flood irrigation), FFP (farmers&amp;#8217; conventional fertilization, flood irrigation), OPT1 (80% of FFP fertilization, flood irrigation), OPT2 (80% of FFP fertilization, drip irrigation). N&lt;sub&gt;2&lt;/sub&gt;O isotopocule deltas, including &amp;#948;&lt;sup&gt;15&lt;/sup&gt;N&lt;sup&gt;bulk&lt;/sup&gt;, &amp;#948;&lt;sup&gt;18&lt;/sup&gt;O and SP (the &lt;sup&gt;15&lt;/sup&gt;N site preference in N&lt;sub&gt;2&lt;/sub&gt;O), have been used to investigate microbial pathways of N&lt;sub&gt;2&lt;/sub&gt;O production under different treatments. Our results showed: i) optimized fertilization and drip irrigation significantly improved the fertilizer and water use efficiency without reducing tomato yield, ii) compared with flood irrigation, drip irrigation decreased soil WFPS and soil ammonium content, but increased soil nitrate content. When soil moisture was higher than 60%WFPS, drip irrigation led to a decrease of N&lt;sub&gt;2&lt;/sub&gt;O emission with lower N&lt;sub&gt;2&lt;/sub&gt;O SP signature observed than that of food irrigation, suggesting a reduction of denitrification derived N&lt;sub&gt;2&lt;/sub&gt;O. In contrast, drip irrigation significantly increased N&lt;sub&gt;2&lt;/sub&gt;O emission and N&lt;sub&gt;2&lt;/sub&gt;O SP value when soil moisture status was lower than 55% WFPS, which may be due to the enhanced nitrification or fungal denitrification derived N&lt;sub&gt;2&lt;/sub&gt;O.&lt;/p&gt;

scholarly journals Effect of Different Rates of Poultry Manure and Bio-Slurry on the Yield of Solanum aethiopicum Shum

2018 ◽  
Vol 10 (4) ◽  
pp. 158 ◽  
Author(s):  
Mary Nanyanzi ◽  
Elizabeth Balyejusa Kizito ◽  
Michael Masanza ◽  
Godfrey Sseruwu ◽  
Moses Makoma Tenywa
Keyword(s):  
Soil Fertility ◽  
Block Design ◽  
Poultry Manure ◽  
Crop Productivity ◽  
Application Rate ◽  
Sub Saharan Africa ◽  
Vegetable Production ◽  
Solanum Aethiopicum ◽  
Randomized Block Design ◽  
Poor Soil

Poor soil fertility remains the major cause of low crop productivity on smallholder farms that are engaging in vegetable production in sub-Saharan Africa. Appropriate soil fertility regimes are therefore critical for improving crop productivity. Its yield has remained low mainly due to poor soil fertility. A field experiment in two different seasons was planted in a Completely Randomized Block Design using Solanum aethiopicum Shum (Nakati). The treatments were 3 sole fertilizer options applied at the following rates: poultry manure and bio-slurry manure at 5, 10, 15, 20, 25 and 30 t ha-1, NPK (25:5:5) at the recommend application rate for tomato which is a sister crop and a control without any fertilizer. Crop budgets were used to determine the economic optimum rates of both sole applications of manure and combinations of manure with NPK. The sole applications and showed significantly (p ≤ 0.05) increased the yield of S. aethiopicum compared with the control. The established biological optimum rates were at 24.19 t ha-1 and 21.51 t ha-1 for poultry manure and bio-slurry respectively. Using the crop budgets it was concluded that the established economic optimum rates were 20 t ha-1 and 10 t ha-1 for sole poultry manure and bio-slurry respectively. Recommendations for use of sole poultry manure and bio- slurry at the rate of 20 t ha-1 and 10 t ha-1 respectively were made.

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