Characteristics of nitrogen and phosphorus in paddy field after rain storage and its effects on rice growth

doi:10.14088/j.cnki.issn0439-8114.2022.24.010

Abstract

Abstract: To explore the characteristics of nitrogen and phosphorus in paddy fields and the effects on rice（Oryza sativa L.） growth after rain storage irrigation, three kinds of storage ceiling （100 mm, 80 mm and 60 mm） were set based on frequent irrigation with water at the depth of just covering the field surface that was taken as control. The pit test of rain storage irrigation for rice was conducted under natural precipitation, and nitrogen and phosphorus characteristics of the surface water in field and the final impact on crop agronomic traits after rain storage in each treatment were analyzed. The results showed that there was no significant difference （P>0.05） in the concentrations of nitrate nitrogen, ammonium nitrogen, total nitrogen and total phosphorus in the surface water among rainwater storage treatments under the condition of the same fertilizer amount, irrigation water quality and solute, and the concentrations of each substance in the surface water of each rainwater storage treatment gradually decreased with time. There was no significant difference （P>0.05） in the agronomic traits of rice among treatments, and rain storage had no effect on the agronomic traits of rice. In conclusion, in normal and dry years, rain storage below 100 mm has no significant impact on nitrogen and phosphorus of surface water in field, and crop growth and development, in the perspective of water saving and emission reduction, it can be widely promoted.

Key words: rain storage irrigation, rice（Oryza sativa L.）, field water, water environment, agronomic trait, expand pollution capacity

CLC Number:

S275.9

YE Hao, HUANG Bi-shan, DING Wei, XIAO Bin, ZHAO Sheng-shuai, ZHANG Ping. Characteristics of nitrogen and phosphorus in paddy field after rain storage and its effects on rice growth[J]. HUBEI AGRICULTURAL SCIENCES, 2022, 61(24): 45-48.

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