| 肖新,储祥林,邓艳萍,黄璐,赵言文,汪建飞.江淮丘陵季节性干旱区灌溉与施氮量对土壤肥力和水稻水分利用效率的影响[J].干旱地区农业研究,2013,31(1):84~88 |
| 江淮丘陵季节性干旱区灌溉与施氮量对土壤肥力和水稻水分利用效率的影响 |
| 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 |
| 中文关键词: 水稻 灌溉模式 施氮量 水分利用效率 土壤化学特性 土壤微生物学特性 |
| 英文关键词:rice irrigation nitrogen application water use efficiency soil chemical characteristics soil microbiological characteristics |
| 基金项目:安徽省青年科学基金项目（10040606Q12）；农业部
公益性行业（农业）专项经费项目（201103004） |
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| 中文摘要: |
| 采用防雨棚池栽试验，研究灌溉模式和施氮量对水稻土壤肥力和水分利用效率的影响。结果表明，灌溉模式与施氮量对土壤化学特性、土壤微生
物学特性、产量及水分利用效率有着显著影响。与常规灌溉相比，控制灌溉条件土壤有机质
含量、全氮含量、全钾含量、速效磷含量、速效钾含量、细菌数量、真菌数量和水分利用效
率增加，碱解氮含量和放线菌数量降低。随着施氮量增加，土壤有机质含量、全氮含量、碱
解氮含量、放线菌和真菌数量增加，而全磷含量、全钾含量、速效磷和速效钾含量降低，产
量和水分利用效率呈现先增加后降低的趋势。在本研究条件下，以控制灌溉模式，施氮量18
0 kg·hm-2，产量达到11 495 kg·hm-2，节本增效效应最佳。 |
| 英文摘要: |
| 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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