作物根群与地上部分是有机的整体。要造就一个合理的群体结构,在栽培技术上如何促进根群生长发育,提高活力、防止早衰,就成为作物高产栽培的生理基础,研究根群的特性是高产栽培的重要环节。 1982年,笔者在赤坎公社石溪大队长征生产队搞高产示范点。连续两造采用控取根系,在自然条件下静态观察的方法,对杂优稻的根群进行了初步的研究,并结合面上的有关调查,在栽培技术上有了些新的认识。 (一)杂优稻根群生长特性 1.根群生长曲线有3个高峰,即移植后至分蘖盛期前,发根旺盛,增值最快,出现第一个发根高峰。在幼穗分化至幼穗形成期,支 Crop root and aboveground parts are organic whole. To create a reasonable group structure, how to promote root growth and development, increase vitality and prevent premature aging, it becomes the physiological basis of crop high yield cultivation. Studying the characteristics of root mass is an important part of high yielding cultivation. In 1982, I made a high-yield demonstration at the Long March production team of Shihsi Brigade in Chikan Commune. For two consecutive generations, the root system of hybrid rice was studied by root control and static observation under natural conditions. With the relevant investigation on the surface, some new understandings on cultivation techniques were obtained. (A) heterosis rice root growth characteristics 1 root growth curve has three peaks, that is, after transplanting to the tillering peak, strong roots, the fastest growing value, the first peak of hair roots. Differentiation in panicle to panicle formation, branch