Response of Rice and Maize Yield to Inherent Soil Productivity of Paddies and Fertilization in Chongqing China

DOI

10.2991/essaeme-17.2017.25How to use a DOI?

Keywords

Paddy field, dry farm, basic soil fertility, output, fertilization, Chongqing

Abstract

Through research on basic soil fertility, nutrient supply capacity and the effect of fertilization on Chongqing paddy fields and dry farms, we evaluated the impact of basic soil fertility and fertilization on the output of rice, clarifying the relationship between basic soil fertility and the utilization efficiency of nutritional absorptions of Nitrogen, Phosphorus and Potassium. Our goal was to provide a scientific reference on fertilizer for the enhancement of soil fertility and a reasonably high output of crops at low cost. This paper determines grain and straw output and the nutrient absorption of rice and maize according to the selection of five treatments: CK, PK, NK, NP and NPK5. Data were collected from 703 rice plots and maize pilots in Chongqing under the stated project of soil testing and formulated fertilization during 2006-2010. We analyzed the current condition of basic soil fertility, nutrient supply capacity and effect of fertilization, as well as the interrelation of paddy fields and dry farms in Chongqing, and estimated the fertilization effect, the output stability and sustainability across different basic soil fertilities on the basis of rice production. The basic soil fertility outputs of Chongqing paddy fields and dry farms are 6.0 and 4.0 t-hm2, respectively, with sharp differences among regions. The Western Chongqing produces the highest quantity, followed by the Central Chongqing, the Southeastern and finally the Northeast with the lowest quantity. Statistical results from the experiment revealed a significant positive correlation between farmland fertilization output and basic soil fertility. Hence, basic soil fertility plays a vital role in nutrient supply capacity, yield increase from fertilizer, and the sustainability and stability of output, whether in paddy fields or dry farms. The supply capacities of Nitrogen, Phosphorus and Potassium in Chongqing paddy fields are 101, 57 and 165 kg/hm2, respectively, with the decrease of Nitrogen, Phosphorus and Potassium under yield increase of fertilizer by 102 47 and 101 kg/hm-2, yield increase of fertilizers- Nitrogen, Phosphorus and Potassium keep decreased successively, which are 30.7%, 19.2%, 12.1%, respectively. Nitrogen remains the most important nutrient for enhancing the output of crops. The soil fertility of paddy fields and dry farms rises to high-grade soil fertility from the middle-grade with increases in the sustainability and stability of output. In the context of low-grade soil fertility, the farmland maintains sustainability and stability in the level of low output.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Tao Liang
AU  - Xiaojun Shi
AU  - Yan Chen
AU  - Yidan Xu
PY  - 2017/07
DA  - 2017/07
TI  - Response of Rice and Maize Yield to Inherent Soil Productivity of Paddies and Fertilization in Chongqing China
BT  - Proceedings of the 2017 3rd International Conference on Economics, Social Science, Arts, Education and Management Engineering (ESSAEME 2017)
PB  - Atlantis Press
SN  - 2352-5398
UR  - https://doi.org/10.2991/essaeme-17.2017.25
DO  - 10.2991/essaeme-17.2017.25
ID  - Liang2017/07
ER  -