Prediction of Grain Yield in Henan Province Based on Grey BP Neural Network Model

Table 4

Prediction of key impact factors for grain yield in Henan Province based on metabolism GM (1, 1) model.

Year
2020	14 629.4	8 185.3	10.4	93.4	14.6	9 554.8	5 460.8	677.5	341.5	4.0
2021	14 571.6	8 205.2	9.9	90.7	14.1	9 432.7	5 485.9	668.5	347.1	3.7
2022	14 514.0	8 225.2	9.4	87.4	13.8	9 312.1	5 511.0	659.6	352.9	3.4
2023	14 456.7	8 245.2	8.9	84.3	13.5	9 193.1	5 536.3	650.8	358.7	3.1
2024	14 399.6	8 265.3	8.6	81.4	13.1	9 075.5	5 561.7	642.1	364.7	2.8
2025	14 342.7	8 285.4	8.1	78.5	12.8	8 959.5	5 587.3	633.6	370.7	2.5

The specific meaning of each key impact factor in the table is as follows. : Grain sown area (10³ hectares); : Area of cultivated land (10³ hectares); : Consumption of chemical pesticides (10⁴ tons); : Diesel oil use for agriculture (10⁴ tons); : Plastic Film Use for Agriculture (10⁴ tons); : Total Power of Agricultural Machinery (10⁴ kw); : Irrigated Area (10³ hectares); : Fertilizer application in discounted amounts (10⁴ tons); : Electricity Consumption in Rural Areas (10² million kwh); : Share of the contributions of primary industry (%).