苜蓿是牲畜的优质饲草,是作物的良好前茬,是改良土壤、培肥地力的最好牧草。所以新疆有“苜蓿长过腰,牲畜不跌膘”、“种几年苜蓿,收几年好麦”、“一亩苜蓿三亩田,连种三年劲不完”的农谚。 炮台垦区近几年由于缺水和苜蓿菟丝子危害,严重地影响到苜蓿生长发育,是目前生产中值得重视的一个重要问题。 苜蓿菟丝子对苜蓿的危害,严重地影响到苜蓿的生长,因而也就影响到苜蓿草与种籽的收成。据调查:一年生苜蓿受菟丝子危害后,草的收成要减少14—44％,种籽要减少67—80％。其所以如此是因菟丝子不能自身制造养分,全依靠从苜蓿植株上吸取水分与养分,以营其生殖。据测定:苜蓿菟丝子每形成100斤干物质,需要从苜蓿植株上吸 Alfalfa is a high-quality forage for livestock and is a good front crop for crops. It is the best forage to improve soil and fertility. Therefore, Xinjiang has “alfalfa over the waist, livestock does not fall 膘,” “a few years of alfalfa, harvest years of good wheat,” “three acres of alfalfa three acres of land, even three years of endless Jin farming endorsement.” In recent years, due to the water shortage and the damage of alfalfa dodder, the land reclamation area severely affected the growth and development of alfalfa, which is an important issue worth paying attention to at present. The damage of alfalfa dodder to alfalfa seriously affects the growth of alfalfa, thus affecting the harvest of alfalfa grass and seeds. According to the survey: annual cotyledons damaged by dodder, the grass yield to be reduced 14-44%, 67-80% reduction of seeds. So it is because dodder can not make their own nutrients, relying entirely on alfalfa plants to absorb water and nutrients to camp their reproduction. It is determined: alfalfa dusky per 100 kg of dry matter, need to suck up from alfalfa plants