Effect of release controlled urea on rice yield and N use efficiency in Sichuan basin

IPNI-2008-CHN-SC16

Response of Winter Rapeseed to Controlled-Release Urea in Sichuan, 2011 The objective of this field experiment was to evaluate the response of winter rapeseed to controlled-release urea (CRU) under rain-fed conditions in Sichuan Basin. The deliverables from the project will be the impact on crop yield, N uptake, and economic benefit. The field experiment in 2011 was conducted on an alluvial loam soil with four N rates (0, 90, 135, and 180 kg N/ha) and three replications. Read more


Year of initiation:2008
Year of completion:2010

Interpretive Summary

Response of Winter Rapeseed to Controlled-Release Urea in Sichuan, 2011 The objective of this field experiment was to evaluate the response of winter rapeseed to controlled-release urea (CRU) under rain-fed conditions in Sichuan Basin. The deliverables from the project will be the impact on crop yield, N uptake, and economic benefit. The field experiment in 2011 was conducted on an alluvial loam soil with four N rates (0, 90, 135, and 180 kg N/ha) and three replications.

Effect of Controlled-Release Urea on Rice Yield and Nitrogen Use Efficiency in the Sichuan Basin, 2010 The objective of this field experiment was to continue evaluating the effect of controlled-release urea (CRU) applied at rice transplanting to regular/bare urea (RU) split at rice transplanting and tillering stage. The deliverables from the project will be data on the impact of CRU on crop yield, N uptake, and economic benefit.

Effect of Controlled-Release Urea on Rice Yield and Nitrogen Use Efficiency in the Sichuan Basin, 2009 The objective of this study was to evaluate the effects of controlled-release urea (CRU) applied at rice transplanting and regular urea (RU) split between transplanting and the tillering stage. The study will assess treatment impact on crop yield, N uptake, residual soil N, and economic benefit. The experiment was conducted on a medium-to-high fertility soil with four N rates (0, 75, 112.

Effect of Controlled-Release Urea on Rice Yield and Nitrogen Use Efficiency in the Sichuan Basin, 2008 Improper fertilization is commonly blamed for nutrient losses from farmlands and eutrophication of waterways. One example is the practice of using a single, basal N application in rice. This practice is popular in areas where most of the local labor force choose to temporarily leave farmlands for more industrialized areas in order to earn off-farm income.

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Project Leader

Sun, Xifa, Sichuan Agricultural Sciences and Chongqing Ag-tech Extension Center


Project Cooperators

Wenqiang Feng
Yusheng Qin


IPNI Staff

Shihua Tu


Location

Asia \ Eastern Asia \ CHN \ Sichuan

Asia \ Eastern Asia \ CHN \ Chongqing


Topics

4r rate, 4r source, balanced nutrition, nutrient use efficiency

rice

Nitrogen (N)