关中棉花前作多为晚秋作物,毛苕子套播在晚秋作物行间,利用冬前及早春生长一季绿肥,翻压后作棉花底肥,肥效好,对棉花增产显著。但毛苕在冬前和早春低温条件下,生长较慢;生长最快的时候是4月以后,这时与棉花播期有矛盾,因而毛苕的翻压期也有冬前、早春、晚春等不同时期翻压的做法。我们进一步探索了毛苕子不同翻压期对棉花产量的影响,为毛苕栽培利用提供科学依据。试验在我所附近东魏店生产队进行,试验地肥力中上等。毛苕于8月1日在玉 Guanzhong cotton crop mostly late autumn crop, Mao Zizi interplanted crop lines in the late autumn, the use of winter and early spring to grow a green manure, turning pressure after the cotton at the end of fertilizer, good effect, a significant increase in cotton yield. However, in early winter and early spring, the catfish grows slowly, while the fastest growing time is after April, when there is a contradiction with the sowing date of cotton. Therefore, the cathartes of the catfish also have the periods of pre-winter, early spring and late spring etc. Turn the pressure in different periods of practice. We further explored the effect of different turnip periods on the yield of cotton and provided a scientific basis for the cultivation and utilization of Chinese quince. The experiment was carried out by the production team in Dongwei shop nearby to me. Mau Mau on August 1 in jade