Urea Application Rate for Crop Straw Decomposition in Temperate China

Table 7

Enquiry table for urea applied to early rice straw returning to the field in two major early rice areas and every provinces (cities, autonomous regions) in China.

Regions		Average early rice yield per unit from 2015 to 2017	Urea dosages of different C : N adjustment targets
			25 : 1	30 : 1	35 : 1
Early rice area in the Middle-Lower Yangtze Region of China	Zhejiang	6073	101.02	74.16	55.06
	Anhui	5795	96.48	70.79	52.42
	Jiangxi	5736	95.50	70.12	51.95
	Hubei	5733	95.45	69.99	51.99
	Hunan	5887	97.92	71.94	53.31
	Average	5815	96.77	71.07	52.74
Early rice area in South China	Fujian	6069	100.95	74.21	54.98
	Guangdong	5948	99.03	72.66	53.94
	Guangxi	5918	98.43	72.36	53.64
	Hainan	5612	93.43	68.51	50.90
	Yunnan	5435	90.43	66.48	49.26
	Average	5912	98.43	72.17	53.57

Unit: kg/ha.