In the past, wheat fertilization has always been a “forefoot, medium-heavy, and late-light†fertilization method, that is, sufficient base fertilizer, medium-term heavy green fertilizer application (fertilization before and after the Spring Festival), and little fertilization in the later period. According to the practice and investigation, the yield increase effect of the application of returning green-fertilizer in mid-growth is not obvious. The “Vâ€-type fertilization technology, ie, “forefoot, medium-light, and heavy-duty†fertilization method, has a good effect on wheat yield increase.
Forefoot applies basal fertilizer, generally 750 kg per acre Shinongjiafu, urea 20 ~ 25 kg, 30 ~ 40 kg ternary compound fertilizer, zinc sulfate and other fertilizer 1.5 ~ 2 kg, in order to facilitate the cultivation of pre-winter seedlings, enhance plant Cold resistance and resistance to fight for more childbirth.
Before and after the Mid-Autumn Festival, 6 to 8 kg of urea was applied to the fields with poor growth potential. The fields with good growth were not fertilized, and the plots with excessive growth or crop appearance were used for “Zhuangfengan†and paclobutrazol. Prevent late lodging.
The weight of the post-heavy wheat is fixed at the base of the internode for replanting the jointing booting fertilizer, or fertilized at the end of April or early May. That is, after March 20th, according to the wheat seedlings and plant growth, rainy days, spread 12 to 15 kg of urea per acre. The good growing plots should be applied less frequently, and should be applied later. If not, apply more and apply early. In addition, in the wheat heading period and before and after flowering, combined pest control 2 to 3 times fertilizer spray or root dressing, to further enhance the vitality of roots, root protection leaves. According to several surveys conducted in recent years, due to strong stamina after fertilization, the wheat flag leaves are larger than the inverted two leaves, and the inverted two leaves are larger than the inverted trefoil, especially the small flowers in the lower part of the wheat ear are less degraded, the panicles are larger in size and the seed setting rate is higher. The number of grains per panicle increased and the average grain number per panicle increased by 4 to 5, and the grain weight increased by more than 3 percentage points. Application of jointing and panicle fertilizer can increase wheat production by more than 15%, and the ratio of production to investment is 5:1.