NDLI: Short- and long-term effects of rice straw application on nitrogen uptake by crops and nitrogen mineralization under flooded and upland conditions

Content Provider	Springer Nature Link
Author	Takahashi, Shigeru Ueso, Shigeru
Copyright Year	2003
Abstract	We investigated short- and long-term effects of rice straw application to paddy soils on crop growth, mineralization of straw N, and soil N supply under flooded and upland conditions. For investigating the short-term effects, pot and laboratory incubation experiments with $^{15}$N-labeled rice straw were conducted. In the incubation experiment over 90 days at 25 °C, 23–24% of N in the $^{15}$N-labeled rice straw was mineralized under upland and flooded conditions. In the pot experiment, 13–14% of N in the $^{15}$N-labeled rice straw was taken up by maize (Zea mays L.) and paddy rice (Oryza sativa L.). These values were greater than those with the $^{15}$N-labeled rice straw compost, however, N derived from the rice straw contributed to soil inorganic N and N uptake by crops only a small extent under flooded and upland conditions. Continuous application of rice straw (5 Mg ha$^{−1}$ year$^{−1}$ for 12 years) increased soil total N and total C. Nitrogen uptake by paddy rice, upland rice and maize in the field experiment, and inorganic N in the incubation experiment over 91 days at 25 °C increased in the soil with the continuous rice straw application compared with the soil without rice straw application. Gross rates of N mineralization under flooded conditions also increased by the continuous rice straw application. The degrees of increase in N uptake by paddy rice and upland crops and increase in gross rates of N mineralization by continuous rice straw application were higher than the degree of increase in total N in the soil. Continuous application of rice straw contributed to the improvement of soil fertility and the promotion of growth and N uptake by paddy rice and upland crops, while short-term effects on dry matter production and N uptake by crops were little. The appropriate timing of rice straw incorporation and combination use of rice straw and mineral fertilizer would improve the short-term effectiveness.
Starting Page	291
Ending Page	301
Page Count	11
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	251
Issue Number	2
e-ISSN	15735036
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2003-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecology Plant Sciences Plant Physiology Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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