Production Mode and Economic Benefit of Improved No-tillage Intercropping with Potato in New mode Citrus Orchard

Abstract

he most popular farming method. [Methods] Based on the climate and soil conditions in Zhaoqing, this experiment explored the improved mode of no-tillage intercropping winter potato with citrus in the new high-ridge, wide-row and dense-plant cultivation mode citrus orchard. Taking the conventional tillage and film-mulched intercropping as the control, it studied the adaptability of intercropping, evaluated the quality, and analyzed its economic benefits. [Results] The early emergence rate of improved no-tillage intercropping cultivation was slightly higher than that of conventional tillage and film-mulched intercropping, but the difference of final emergence rate was not significant, indicating that improved no-tillage intercropping cultivation could provide excellent potato emergence environment. Under the conventional tillage and improved no-tillage intercropping cultivation mode, the change trend of the potato's plant height, main stem thickness, crown diameter and number of leaflet is the same. The change rule of the crown diameter of the film-mulched intercropping cultivation method is similar to that of the plant height, both have a large increase in the late growth stage. The potato yield of improved no-tillage intercropping cultivation were 22 747.5 kg/ha, and the proportions of potatoes of each grade were 11.85%, 35.61%, 37.63% and 14.91%, respectively. The content of dry matter, Vc, soluble protein, starch and amino acid in the main nutrients of the potato under the improved no-tillage intercropping model is not significantly different from that of the film-mulched intercropping cultivation. The changing trend of reducing sugar content showed that the reducing sugar content of no-tillage intercropping cultivation was the highest (0.466%). Through evaluating the eating characteristics of potatoes from the flavor, taste, texture and appearance after chewing, the three cultivation methods have little difference. In the no-tillage intercropping cultivation technology, the growth of potatoes consumes part of the nutrients in the soil between the rows of the citrus orchard, but it does not exerts a significant impact on the surrounding citrus trees. Compared with the film-mulched intercropping cultivation, the improved no-tillage intercropping cultivation method does not require the expense of mulched, the cost of fertilizer is low, and labor costs are saved, so a net income of 27 075 yuan/ha can be obtained. [Conclusions] From the perspective of orchard intercropping, it has achieved the effect of improving soil utilization and increasing output without reducing the edible quality of potatoes.