The technologies of manuring,irrigation,cultivation and growth features of rotary tillage and broadcast sowing for wheat planted after rice

Extensive researches have been carried out to study the growth features of wheat planted after rice by rotary tillage and broadcast sowing.The growth and development of the wheat can be generalizied into four obivious features as following:small nutritive organ,slowly development at earlier stages while quickly at later stages,abundant tillers with lower percentage of productive tillers,less number of grains but heavy grain weight. Cultivation indexes and high yield measures for heavy panicle weight and medium height wheat variety such as Hanfen 87-2 planted at high density are put forward. The yield increase effects of potassium and zinc are confirmed. The combining dressing of nitrogen,phosphorus,potassium and zinc can generate productive young tillers and secondary roots. Furthly the irrigation technicals are presented in related to the dynamics of soil water.