Response of maize yields variability under different fertilizers deficiency scenarios to ecological factors in mountainous region
Journal Title: 广东农业科学 - Year 2018, Vol 45, Issue 3
Abstract
"Based on the records of Soil Test & Formulated Fertilization Project implemented during 2008 to 2009 in Chongqing，combining climatic data during the maize growth period and terrain variables，the response of maize yields variability under three scenarios including the deficiency of soil nitrogen，phosphorus and potassium to ecological factors were analyzed using K-means and Classification tree model. The results showed significant differences were found among three different scenarios. Particularly，the yield with N-deficiency was lower than that with P and K-deficiency. In addition，the obvious differences among the relative importance of ecological factors to maize yields were also observed. For N-deficiency scenario，the relative importance of ecological factors were ranked by soil properties > climate > terrain，soil available nitrogen played the most important role. For P-deficiency scenario，climate variables followed by soil properties and terrain were the most important factors affecting maize yield，the sunshine hours was the most important factors. For K-deficiency scenario，climate factors also played the most important roles，rainfall was of great importance for maize yield variability. Meanwhile，the CART model explained 65.7%，79.8% and 83.8% of maize yields variability under three different scenarios."
Authors and Affiliations
Yuan-yuan RAN, Hong-bin LIU
Keywords
Related Articles
- EP ID EP596243
- DOI 10.16768/j.issn.1004-874X.2018.03.002
- Views 57
- Downloads 0
Effects of different litchi rootstocks on phenological period and fruit qualities of grafted Jingganghongnuo
"Phenological period and fruit quality of Jingganghongnuo（ JGHN） grafted on rootstock of Feizixiao （FZX），Heiye（ HY） and Huaizhi（ HZ） respectively were recorded and comparatively studied from 2015 to 2017. The re...
Current status and prospects of sugarcane pokkah boeng disease
"Sugarcane pokkah boeng disease was a fungal disease outbreak in recent years，which had been recorded in almost all countries where sugarcane is grown commercially and causes serious damage to sugarcane industry all ove...
Welfare effect analysis of technical progress in grain production
"Technological progress in grain production is one of the main driving forces to increase grain production，but the economic surplus brought by technological progress is unevenly distributed between producers and consume...
Identification and cluster analysis of stripe rust resistance in 22 wheat varieties in Sichuan province
The wheat varieties cultivated in 22 Sichuan areas approved by Sichuan Province from 2010 to 2017 were selected,and their resistance to stripe rust was identified and high-resistance varieties were screened. Then, the fi...
Innovation ability evaluation and promotion strategy of Agricultural Science and Technology Park in Beijing-Tianjin-Hebei Region
"This paper firstly analyzed the status quo and efforts of seven national agricultural science and technology park of Beijing-Tianjin-Hebei region, and built the index evaluation system consists of 3 level indicators, 11...