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Angelica sinensis with shade net coverage: high yield increase and quality improvement benefits

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The shade cultivation technique for Angelica sinensis starts from the three-leaf stage of its growth (that is, from mid-May to early August after summer begins, when temperatures are high and light is intense). A shade net with a 50% shading rate is timely placed over Angelica sinensis, providing a suitable micro-environment of moderate temperature, weak light, and moisture that mimics its original ecological growing conditions. By lowering temperature, increasing humidity, and reducing light, it reduces the early bolting rate of Angelica sinensis in dry flatland cultivation to about 30%; moreover, shade cultivation of Angelica sinensis also helps prevent and reduce pest and disease damage, thus improving the quality of Angelica sinensis.

The shade cultivation technique for Angelica sinensis starts from the three-leaf stage of its growth (that is, from mid-May to early August after summer begins, when temperatures are high and light is intense). A shade net with a 50% shading rate is timely placed over Angelica sinensis, providing a suitable micro-environment of moderate temperature, weak light, and moisture that mimics its original ecological growing conditions. By lowering temperature, increasing humidity, and reducing light, it reduces the early bolting rate of Angelica sinensis in dry flatland cultivation to about 30%; moreover, shade cultivation of Angelica sinensis also helps prevent and reduce pest and disease damage, so its effect on improving the quality and increasing the yield of Angelica sinensis is very significant.

According to experimental results, shading Angelica sinensis during cultivation reduces surface evaporation and plant transpiration, greatly improving water use efficiency, and the output rate of extra-grade and first-grade Angelica sinensis increases by 12.3% with good uniformity. In shade cultivation, 43 kg of shade net is used per mu, the shade material cost is 685 yuan, and it can be used for 2 to 3 years, while the average yield of Angelica sinensis reaches 179.4 kg per mu, an increase of 80.9 kg compared with the control of 98.5 kg, and can increase value by 708 yuan. The overall yield of shade facility cultivation is greatly higher than that of open-field cultivation, with a yield increase rate of up to 24.5%, significantly improving the economic benefits of Angelica sinensis cultivation. Another advantage of shade cultivation for Angelica sinensis is that after shading, the special micro-environment not only has the effect of repelling and preventing aphids, but also can reduce the population density of red spider mites and alleviate the damage of Angelica sinensis root rot disease. Therefore, shade cultivation of Angelica sinensis is a good technique for increasing agricultural efficiency and farmers' income, opening up a new path for high and stable yields of Angelica sinensis, creating a new technique for facility cultivation of Angelica sinensis, and its prospects for promotion and application are very broad.

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