scholarly journals Distribution characteristics of insect diversity in long-term fixed monitoring plots in Northeast China

PLoS ONE ◽  
2021 ◽  
Vol 16 (8) ◽  
pp. e0250689
Author(s):  
Jinwen Liu ◽  
Xiujuan Yan ◽  
Xinyuan Song ◽  
Jiamei Zhang ◽  
Donghui Wu ◽  
...  
Keyword(s):  
Northeast China ◽  
Black Soil ◽  
Insect Community ◽  
Insect Communities ◽  
Ecological Processes ◽  
Structure Changes ◽  
Biodiversity Maintenance ◽  
Observation Method ◽  
Direct Observation Method

The spatial patterns of field arthropod communities are an essential part of ecology and can provide fundamental data regarding field ecological processes and reveal the mechanism of ecosystem biodiversity maintenance. This study investigated the spatial distribution pattern of field insect communities to detect the spatial relationships between insect communities in farmland. The study site was located at the Dehui Agro-ecological Experimental Station of Black Soil, Jilin, China. Insect communities and environmental factors were sampled at 121 uniformly distributed points in a 400 × 400 m plot in August, September, and October 2015. The analysis revealed that insect communities from June to October demonstrated significant spatial correlation, and 6085 samples of 47 species and 47 families in 11 orders were collected from the insect community in the farmland. The farmland insect community structure changes and dynamic changes of nutritional function groups occur with time. According to the 400 x 400 m plot, the diversity of farmland insect communities and functional groups is maintained at a relatively high and stable level. In this study, a total of 6085 samples of corn farmland insects were obtained using the fluke method and direct observation method, including 11 orders, 26 families and 47 species, 4 absolute dominant populations, 6 main dominant populations, and 37 other populations. These studies can provide help for pest control in the spring corn area of Northeast China.

scholarly journals Effect of long-term tillage on soil aggregates and aggregate-associated carbon in black soil of Northeast China

PLoS ONE ◽  
2018 ◽  
Vol 13 (6) ◽  
pp. e0199523 ◽  
Author(s):  
Hongbing Zheng ◽  
Wuren Liu ◽  
Jinyu Zheng ◽  
Yang Luo ◽  
Ruiping Li ◽  
...  
Keyword(s):  
Northeast China ◽  
Soil Aggregates ◽  
Black Soil

Effects of long-term no tillage treatment on gross soil N transformations in black soil in Northeast China

Geoderma ◽  
2017 ◽  
Vol 301 ◽  
pp. 42-46 ◽  
Author(s):  
Siyi Liu ◽  
Xiaoping Zhang ◽  
Jun Zhao ◽  
Jinbo Zhang ◽  
Christoph Müller ◽  
...  
Keyword(s):  
Northeast China ◽  
Black Soil ◽  
No Tillage ◽  
Soil N ◽  
N Transformations ◽  
Tillage Treatment

scholarly journals Response of organic nitrogen in Black Soil to long-term different fertilization and tillage practices in Northeast China

2016 ◽  
Vol 11 (No. 2) ◽  
pp. 124-130 ◽  
Author(s):  
L. Yan ◽  
H. Li ◽  
J. Zhang ◽  
Z. Zhang ◽  
P. Zhu ◽  
...  
Keyword(s):  
Northeast China ◽  
Organic Nitrogen ◽  
Black Soil ◽  
Tillage Practices

Effect of long-term fertilization on the phosphorus content of black soil in Northeast China

2014 ◽  
Vol 63 (sup2) ◽  
pp. 156-161 ◽  
Author(s):  
Xingzhu Ma ◽  
Zhijie Wu ◽  
Lijun Chen ◽  
Baoku Zhou ◽  
Zhongchao Gao ◽  
...  
Keyword(s):  
Northeast China ◽  
Phosphorus Content ◽  
Black Soil

scholarly journals Complex soil food web enhances the association between N mineralization and soybean yield – a model study from long-term application of a conservation tillage system in a black soil of Northeast China

SOIL ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. 71-82
Author(s):  
Shixiu Zhang ◽  
Liang Chang ◽  
Neil B. McLaughlin ◽  
Shuyan Cui ◽  
Haitao Wu ◽  
...  
Keyword(s):  
Food Web ◽  
Crop Yield ◽  
N Mineralization ◽  
Northeast China ◽  
Conservation Tillage ◽  
Black Soil ◽  
Soil Organisms ◽  
Soil Food Web ◽  
Soil Biodiversity

Abstract. Long-term (10 years) application of conservation tillage following conversion from conventional tillage (CT) can achieve a new equilibrium in the soil environment, which is vital to reverse soil biodiversity declines and fulfil the goal of maintaining agroecosystem sustainability. However, in such a situation, how the soil community regulates nutrient cycling impacting crop yield is not well documented. Therefore, the relations between mineralized nitrogen (N) delivered by soil food web and soybean (Glycine max Merr.) yield were investigated after 14 years application of CT, reduced tillage (RT) and no tillage (NT) in a black soil (Typic Hapludoll) of Northeast China. We hypothesized that soil mineralizable N would increase with the complexity of the soil food web, and that the trophic groups involved in associating N mineralization with crop yield will vary with soil depth in the conservation tillage practice. During the soybean growing season, soil organisms, including bacteria, fungi, nematodes, mites and collembolans, were extracted and identified monthly from 0–5 and 5–15 cm soil depths to estimate the complexity of the food web indicated by the species richness and connectance indices, and to simulate the mineralized N using energetic food web modelling. The species richness and connectance of the food web at both soil depths were significantly affected by tillage practices, and their values decreased of the order of NT > RT > CT. A similar trend was also revealed for the simulated N mineralization, that is, the mineralized N released either from the functional feeding guilds or from the energy pathways of the food web were greater in RT and NT than in CT at both soil depths. Multiple linear regression analysis showed that soil organisms involved in coupling the mineralized N with soybean yield were different at different soil depths, in which fungal and root pathways at 0–5 cm and bacterial pathway at 5–15 cm were the driving factors for the supply of mineralized N to soybean in NT and RT soils. These results support our hypothesis and highlight the essential role of soil food web complexity in coupling N mineralization and crop yield after long-term application of conservation tillage. Additionally, the current modelling work provides basic hypotheses for future studies to test the impact of soil biodiversity or specific functional guilds on the fate of N in agro-ecosystems.

The effect of long-term fertilization on soil water storage and water deficit in the Black Soil Zone in northeast China

2012 ◽  
Vol 92 (3) ◽  
pp. 439-448 ◽  
Author(s):  
Wenxiu Zou ◽  
Bingcheng Si ◽  
Xiaozeng Han ◽  
Heng Jiang
Keyword(s):  
Soil Water ◽  
Water Deficit ◽  
Northeast China ◽  
Root Zone ◽  
Water Storage ◽  
Black Soil ◽  
Soil Water Storage ◽  
Soil Water Deficit ◽  
Soil Zone

Zou, W., Si, B., Han, X. and Jiang, H. 2012. The effect of long-term fertilization on soil water storage and water deficit in the Black Soil Zone in northeast China. Can. J. Soil Sci. 92: 439–448. The Black Soil Zone in northeast China is one of the most important areas of agricultural production in China and plays a crucial role in food supply. However, further improvement in crop yield hinges on effective management of soil water. There is a poor understanding of how different fertilization methods affect crop water use efficiency. The objective of this study was to examine the effect of different fertilization methods on soil water storage and deficit in Black soils. A long-term experiment was conducted at the National Field Research Station of Agro-ecosystems, at Hailun County, Heilongjiang province in northeastern China from 1999 to 2008. Three fertilizer treatments including no fertilizer (CK), inorganic fertilizer (NP) and inorganic fertilizer plus organic material (NPM) were tested. The results showed that soil water storage decreased in the order CK, NP, and NPM during the growing season and the differences in soil water storage in the active root zone (0–70 cm) and below the active root zone (70–130 cm) and soil water deficit were statistically significant among the three treatments. Due to the uneven temporal distribution of rainfall and crop water uptake, soil water content was very dynamic in all three treatments: The low soil water storage and resulting soil water deficit (defined as the monthly difference between potential evapotranspiration and soil available water storage) within the 0- to 70-cm soil profile were found in both June and July. Further, soil receiving NPM was more likely to have a soil water deficit, but less likely to have excessive water. A lower risk of excess water may result in deeper root penetration and increased water use at greater depth, and thus the water deficit under the NPM treatment may not be the limiting factor for crop production. Therefore, NPM seems a viable management practice for improving crop yields in the Black Soil Zone in northeast China, possibly due to higher soil organic carbon and nutrient supply and lower probability of excess water.

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