摘要
对东西行向、预留棉行为１００ｃｍ的三二式麦棉套种方式研究表明，在小麦抽穗后的麦棉共生期间，预留棉行上的平均光合有效辐射仅为一熟棉田的５０％～８０％，株高低和叶片枯黄时光照削弱较小；在麦棉间距相同的情况下，北行棉花接受的ＰＰＦＤ较多，而正午前后南行棉花易受荫蔽，南行棉花适当北移，保持麦棉间距在３０ｃｍ以上，降低小麦群体株高，防止小麦旺长，起垄种棉，都有利于棉花生长发育。
The fallow row of l00cm wide remained for cotton in the intercropping pattern ofthree rows for wheat and two for cotton(3一2 pattern)of the East一West row direction wasstudied。 It was showed that mean photosyntheticlly active radiation(PAR) penetration in thefallow row was about 50%～80%during the period of wheat and cotton cogrowing periodafter wheat harvest,and the PAR was reduced little if wheat plant height was lower and wheatleaves get yellow,It also showed that the north directed cotton row would receive more PARand the south directed cotton was easy to be shaded if distance between wheat and cotton rowswas the same。It is adapted to cotton growth and development that the distance between wheatand cotton rows is kept about 30cm,wheat plant height is made lower,wheat is prevented fromexcessive vegetative growth and cotton is planted on the ridge。
出处
《棉花学报》
CSCD
北大核心
1994年第2期109-113,共5页
Cotton Science
基金
自然科学基金
关键词
套种
光合有效辐射
棉花
小麦
intercropping of wheat and cotton, PAR,penetration
