Straw mulching with fertilizer nitrogen: An approach for improving crop yield, soil nutrients and enzyme activities

2019 ◽  
Vol 35 (3) ◽  
pp. 526-535 ◽  
Author(s):  
Kashif Akhtar ◽  
Weiyu Wang ◽  
Ahmad Khan ◽  
Guangxin Ren ◽  
Sajjad Zaheer ◽  
...  
Keyword(s):  
Soil Nutrients ◽  
Crop Yield ◽  
Enzyme Activities ◽  
Fertilizer Nitrogen ◽  
Straw Mulching

EFFECT OF FLY ASH ON CROP YIELD AND PHYSICO-CHEMICAL, MICROBIAL AND ENZYME ACTIVITIES OF SODIC SOILS

2016 ◽  
Vol 15 (11) ◽  
pp. 2433-2440 ◽  
Author(s):  
Kripal Singh ◽  
Vimal Chandra Pandey ◽  
Bajrang Singh ◽  
Dharani D. Patra ◽  
Rana P. Singh
Keyword(s):  
Fly Ash ◽  
Crop Yield ◽  
Enzyme Activities ◽  
Sodic Soils ◽  
Physico Chemical

scholarly journals Vegetation degradation impacts soil nutrients and enzyme activities in wet meadow on the Qinghai-Tibet Plateau

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Jiangqi Wu ◽  
Haiyan Wang ◽  
Guang Li ◽  
Weiwei Ma ◽  
Jianghua Wu ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Soil Nutrients ◽  
Enzyme Activities ◽  
Soil Depth ◽  
Soil Nutrient ◽  
Tibet Plateau ◽  
Wet Meadow ◽  
Vegetation Degradation ◽  
Thaw Cycle ◽  
Qinghai Tibet Plateau

AbstractVegetation degradation, due to climate change and human activities, changes the biomass, vegetation species composition, and soil nutrient input sources and thus affects soil nutrient cycling and enzyme activities. However, few studies have focused on the responses of soil nutrients and enzymes to vegetation degradation in high-altitude wet meadows. In this study, we examined the effects of vegetation degradation on soil nutrients (soil organic carbon, SOC; total nitrogen, TN; total phosphorus, TP) and enzyme activities (i.e., urease, catalase, amylase) in an alpine meadow in the eastern margin of the Qinghai-Tibet Plateau. Four different levels of degradation were defined in terms of vegetation density and composition: primary wet meadow (CK), lightly degraded (LD), moderately degraded (MD), and heavily degraded (HD). Soil samples were collected at depth intervals of 0–10, 10–20, 20–40, 40–60, 60–80, and 80–100 cm to determine soil nutrient levels and enzyme activities. The results showed that SOC, TN, catalase and amylase significantly decreased with degradation level, while TP and urease increased with degradation level (P < 0.05). Soil nutrient and enzyme activity significantly decreased with soil depth (P < 0.05), and the soil nutrient and enzyme activity exhibited obvious "surface aggregation". The activities of soil urease and catalase were strongest in spring and weakest in winter. The content of TN in spring, summer, and autumn was significantly higher than observed in winter (P < 0.05). The soil TP content increased in winter. Soil amylase activity was significantly higher in summerm than in spring, autumn, and winter (P < 0.05). TP was the main limiting factor for plant growth in the Gahai wet meadow. Values of SOC and TN were positively and significantly correlated with amylase and catalase (P < 0.05), but negatively correlated with urease (P < 0.05). These results suggest the significant role that vegetation degradation and seasonal freeze–thaw cycle play in regulating enzyme activities and nutrient availability in wet meadow soil.

scholarly journals Effects of Vegetable & Flower Residues Returning with Compound Microorganism on Soil Nutrients Release and Crop Yield

2011 ◽  
Vol 11 ◽  
pp. 774-781
Author(s):  
Fei Shen ◽  
Yongmei Zeng ◽  
Shihuai Deng ◽  
Yongmei Li
Keyword(s):  
Soil Nutrients ◽  
Crop Yield

The response of soil nutrients (carbon and nitrogen) and extracellular enzyme activities to drought in various cultivation ages from tea orchards

2017 ◽  
Vol 37 (2) ◽  
Author(s):  
赵杏 ZHAO Xing ◽  
钟一铭 ZHONG Yiming ◽  
杨京平 YANG Jingping ◽  
吕亚敏 LÜ Yamin ◽  
王小鹏 WANG Xiaopeng
Keyword(s):  
Soil Nutrients ◽  
Enzyme Activities ◽  
Extracellular Enzyme ◽  
Carbon And Nitrogen ◽  
Extracellular Enzyme Activities
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