论文部分内容阅读
田菁(Sesbania connabina Pers)是一种很好的夏季豆科绿肥,近年来已从旱地发展到水田栽培。据各地资料,田菁水栽比旱栽的生长好。在国外,多数国家还是利用野生田菁来肥田,少数国家以田菁作旱地绿肥,只有国际水稻研究所作过田菁水栽的报导。田菁水栽为什么比旱栽好?目前国内外均未见有报导。1977～79年我们对此进行了研究,结果表明,水栽能显著提高根瘤固氮酶活性,从而能提高田菁的固氮效应。一、材料和方法 (一)设计:设水栽和旱栽二处理。 1.田间试验;水栽区0.78亩,旱栽区0.1亩。田菁的移栽方式、密度及施肥管理与大田一致。灌溉用河水。田菁与稻秧共生42
Sesbania connabina Pers is a good summer legume green manure, which has been developed from dry land to paddy field in recent years. According to local information, Tianjing hydroponic growth planted better than dry. Abroad, most countries still make use of wild Tian Jing to fertilize, and a few countries use Tian Jing as dry land green manure. Only the International Rice Research Institute has reported that Tian Jing hydroponics. Tianjing why hydroponic planted better than drought? At present, no reports at home and abroad. From 1977 to 1979, we conducted a study, the results show that hydroponics can significantly improve the activity of nodulation nitrogenase, which can increase the nitrogen fixation effect of Sesbania. First, materials and methods (a) design: set hydroponics and drought planted two processing. 1. Field trials; hydroponics area 0.78 acres, 0.1 acres of dry planting area. Tian Jing’s transplanting methods, density and fertilizer management consistent with the field. Irrigation with river water. Tian Jing and rice seedlings 42