Urea Application Rate for Crop Straw Decomposition in Temperate China

Table 8

Enquiry table for urea application quantity during middle-late rice straw returning to the field with different yields per unit area.

Yield per unit area of middle-late rice	Urea dosages of different C : N adjustment targets
	25 : 1	30 : 1	35 : 1
4500	110.10	80.85	60.00
4875	119.40	87.60	64.95
5250	128.55	94.35	69.90
5625	137.70	101.10	75.00
6000	146.85	107.85	79.95
6375	156.00	114.60	84.90
6750	165.30	121.35	89.85
7125	174.45	128.10	94.95
7500	183.60	134.85	99.90
7875	192.75	141.45	104.85
8250	201.90	148.20	109.95
8625	211.05	154.95	114.90
9000	220.35	161.70	119.85
9375	229.50	168.45	124.95
9750	238.65	175.20	129.90

Unit: kg/ha.