Figure1.cartede l 'la function des champs pé troliers typiques, c' est-àdire g 1, g2 à Guilin, j 1 et j2 dans? Cole and x 1, x2 in xiaochang. Galement and tiquet in the figure represent the characteristics of the surface.

Table 1. Area, sampling point and soil properties of typical field before transplanting

Table 1. This is the champion before transplantation.

Figure 2. Nitrogen and phosphorus flow model in crop production.

Figure 2. Nitrogen and phosphorus flux model in agricultural production.

Table 2. Types and dosage of fertilizers in three research sites

Table 2. In these three different locations, the types of carving and application are different.

Table 3. Analysis of Nitrogen and Phosphorus Balance at Three Research Sites in Rice Season (unit: kg/hm2)

Picture 3. The ratio of nitrogen to phosphorus (unit: kg/hm2) at three stations in Saisong River was analyzed.

Figure 3. Input of nitrogen and phosphorus in three research sites.

Figure 3. The north slope and the south slope are in three different locations.

Figure 4. Output of nitrogen and phosphorus from three research sites.

Figure 4. There are different ideas in these three different places.

Table 4. Contents and changes of available nitrogen and available phosphorus in soil (kg/hm2).

Table 4. Contents and changes of nitrogen and phosphorus in soil (kg/hm2).

* Fertilizer composition: urea (N 46.00%), ammonium bicarbonate (N 17. 10%), calcium superphosphate (P 6.99%) and potassium chloride (K 47.02%).

* Mineral composition: urea nitrogen 46.00%, ammonium bicarbonate 17. 10%, phosphorus 6.99%, potassium chloride 47.02%.

* Guilin double rice;

* Two-day tour in Guilin.

* * There was no significant change before transplantation and after harvest.

* * Changes in meaning before and after transplantation.

Figure 1. Farmland drainage map and water quality monitoring point distribution map (points ①, ②, ③, ④, ⑤, ⑤).

Figure 1. Agricultural drainage distribution and water quality monitoring map (points ①, ②, ③, ④, ⑤ and ⑤).

Figure 2. Schematic diagram of three research sites in different irrigation systems, (a) Zhanghe in Hubei, (b) Qingshitan in Guangxi and (c) Gaoyou in Jiangsu.

Figure 2. There are three research sites in different irrigation systems, (a) (b) Qingshitan Zhanghe River in Hubei, and (c) Gaoyou in Jiangsu.

Figure 3. Removal rates of total nitrogen and total phosphorus by three lines at three locations. Here G stands for Guangxi, J stands for Jiangsu and H stands for Hubei. L 1 stands for the first line of defense.

Figure 3. The progress of amt and tp in these three locations is as follows: ici stands for Guangxi, J stands for Jiangsu, and H stands for Hubei.

Table 1. Nitrogen and phosphorus removal rates of three strains

Table 1. Elimination of nitrogen and phosphorus in three kinds of wood

*: The former figure corresponds to the average removal rate, and the latter figure refers to the variance of the corresponding removal rate. L 1, L2 and L3 represent the first, second and third lines of defense respectively.

*: The first few digits correspond to the maximum elimination, and the last few digits correspond to the change of the maximum elimination.

Table 2 Demolition effect of three lines in Jiangsu.

Table 2 Performance of three companies in Jiangsu.

Note: J stands for Jiangsu, L 1, L2 and L3 stand for the first, second and third lines of defense respectively.

Note: J stands for Jiangsu and Germany, and l2 and l3 stand for the first, second and third defense ministers respectively.