Pear

Treatment: No fertilizer (CK); conventional fertilizer24 (CF), urea (containing N 46%) 0.48 kg/plant, superphosphate (containing P2O5 12%) 1.35 kg/plant, potassium sulfate (containing 50% K2O) 0.61 kg/plant; fermented and decomposed soybean cake fertilizer (SC), 5 kg per plant; decomposed sheep manure (SM), 15 kg/plant; and biogas fertilizer (BM), 100 kg per plant.

Figure 1. Effects of different fertilizer treatments on bearing a branch of Pear.

Results:Different organic fertilizer treatments had significant effects on the growth of bearing branches. Among them, the bearing branch of SC treatment was the longest, significantly higher than that of CK and CF treatments. From May 31, the bearing branch length of all treatments increased significantly. By the end of June, the weight-bearing shoot length of CK and CF treatments increased slowly, while the weight-bearing shoot length of SC, SM and BM treatments continued to increase, but the increase in SC treatment was the largest.

Figure 2. Effects of different fertilizer treatments on leaf area of Pear-jujube.

Results:Effects of different organic fertilizers on leaf area of jujube. Fig. 2 shows that SC treatment had the largest leaf area of 1246 mm2/leaf. The leaf area of SC and BM treatments was significantly higher than that of CK, CF and SM Treatments.

Figure 3.Effects of different fertilizer treatments on relative leaf water content of Pear-jujube.

Results: Sufficient humidity is required at the flowering stage, so high relative water content (RWC) contributes to flowering and improved photosynthesis in pear jujube. It can be seen from figure 5 that the RWC of pear jujube leaves increased slowly. 12 June slight decline. This may be related to the large water demand of jujube trees at this time, in which the application of organic fertilizer can increase the RWC of pear jujube leaves and thus provide the water needed for flowering. By July 1st, the RWC of the leaves reached its peak. Therefore, the application of organic fertilizer can improve the RWC of leaves.

Table 5. Effects of different fertilizer treatments on reproductive growth of Pear-jujube.

Results: Effects of different organic fertilizers on reproductive growth of zizyphus jujube. It can be seen from table 5 that the total flower, fruit number and yield per plant were higher than those of CK after fertilization, and SC treatment had the most significant effect on reproductive growth (p < 0.05) . The seed setting rate and yield of SC treatment were significantly higher than those of CK.

Table 6. Effects of different fertilizer treatments on nutrient quality of Pear-jujube.

Results: Effects of different organic fertilizers on nutritional quality of pear jujube. Table 6 shows that SC and BM had significantly higher fruit water content than CK. The contents of TSS, TSS/TA, VC and total flavonoids in organic fertilizer treatment were higher than those in CK. The order of titratable acid (TA) content was CK > SM > Bm > SC, and SC was the lowest. The VC content of SC was 78.92% higher than that of CK. The content of total flavonoids in SC was 24.57% higher than that in CK.

Treatment: FA refers to the company's customized humic acid solution, while CK denotes the local farmers' fertilization plan.

Figure 4: Effect of Different Fertilizer Treatments on Pear Fruit Color Development

Results: The application of humic acid accelerated the ripening and color change of pears, resulting in more complete color development.