湿地生态型稻茬麦免耕机条播栽培技术研究

Studies on the Technologies of Drilling with Zero-tilling Machine of Wheat after Rice in Wetland

免耕机条播是沿湖涝洼湿地生态区稻茬麦的主要播种方式之一,为探讨其科学栽培技术,分别对免耕机条播稻茬麦的冬前苗,叶面积系数、后期根系活力、播期、播量和多效唑化控进行了研究。结果表明,与稻田套播相比,机条播小麦的基本苗降低了150万/hm2,冬前主茎叶片增加了0.8个,单株茎蘖增加0.9个,单株次生根增加1.4条,茎粗增加1.1mm,地上部鲜重增加0.17g,叶面积系数动态为:冬前0.8,起身1.6,拔节期4.0,挑旗期6.2,灌浆期4.0,后期根系活力分别增加1.21、1.02、0.47,使用多效唑第1、2、3节间分别减少2.3cm、0.8cm、1.3cm,退化小穗数减少0.1个,千粒重增加0.2g。

Drilling with zero-tilling machine was the main mode of wheat after rice in wetland where near to lakes. In order to get the right technology, we studied the effects of drilling with zero-tilling machine on seedlings before winter, leaf area index, and root activity on wheat after rice. Also the effects of sowing stage, sowing rates and PP333 of wheat after rice were studied. The results showed that, compared with the wheat intercropped with rice, the basic seedling was decreased by 1500thousand/hm2, leaf number per stem before winter increased by 0.8,stems and tillers per plant increased by 0.9,secondary root number were increased by 1.4,the stem wide was increased by 1.1cm,and the top wet weight was increased by 0.17g.The leaf area index were increased by 0.8 before winter, 1.6 at getting up stage, 4.0 at jointing stage, 6.2 at flagging stage, and 4.0 at filling stage. The root activity of last periods were increased by 1.21,1.02,and0.47, compared with intercropped, correspondingly. When used PP333, the joint lengths of first to third were decreased by 2.3cm, 0.8cm,and 1.3cm,correspondingly, and the degenerated spikelet number was decreased by0.1, but 0.2g increased 1000-grain weight.