| Effects of irrigation and nitrogen fertilization on soil fertility and water use efficiency of rice |
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| DOI：10.7606/j.issn.1000-7601.2013.01.16 |
| Key Words: rice irrigation nitrogen application water use efficiency soil chemical characteristics soil microbiological characteristics |
| Author Name | Affiliation | | XIAO Xin | Anhui Science and Technology University, Fengyang, Anhui 233100, China | | CHU Xianglin | Anhui Science and Technology University, Fengyang, Anhui 233100, China | | DENG Yanping | Anhui Science and Technology University, Fengyang, Anhui 233100, China | | HUANG Lu | Anhui Science and Technology University, Fengyang, Anhui 233100, China | | ZHAO Yanwen | Nanjing Agricultural University, Nanjing, Jiangsu 210095, China | | WANG Jianfei | Anhui Science and Technology University, Fengyang, Anhui 233100, China |
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| Abstract: |
| The effects of irrigation and nitrogen (N) fertilization on soil fertility and water use efficiency (WUE) of rice were studied in
an experiment of pool culture within rain-proof shelter. Samples were collected
from treatments under control and conventional irrigation receiving N applicati
on of 90 kg·hm-2, 180 kg·hm-2 and 270 kg·hm-2. The results
showed that irri
gation and nitrogen fertilization significantly influenced chemical and microbio
logical characteristics of soil, and yield and water use efficiency of rice. Com
pared with conventional irrigation, organic matter, total N, total P, total K, a
vailable P, available K, WUE, quantity of bacterium and quantity of fungus incre
ased while available N and quantity of actinomycete decreased under control irri
gation. With the increment of N application rates, organic matter, total N, avai
lable N, quantity of fungus, quantity of actinomycete increased, while total P,
total K, available P, available K, quantity of bacterium decreased. However, yie
ld and water use efficiency of rice reached the highest at 180 kg·hm-2 of N applied. It was concluded that control irrigation combined with suitable
N applic
ation rate (180 kg·hm-2) could benefit rice production by reducing c
ost and gaining high yield. |
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