小麦花生两熟制高产生育规律及栽培技术研究──Ⅳ麦油复合群体（B）

STUDY ON THE REGULARITY OF GROWTH AND DEVELOPMENT AND CULTURAL PRACTICES FOR DOUBLLE HIGH YIELDS OF WHEAT AND PEANUT IN TWO-CROPPING SYSTEM ──Ⅳ COMPOUND POPULATION OF WHEAT AND PEANUT(B)

麦油两熟制大田试验结果表明；在共生期为２５～３０ｄ的麦油两熟制双高产复合群体中，小麦基本苗是复合群体的主体，对麦油两作产量效应显著；花生密度对花生产量作用明显，但对小麦产量影响不大。在小麦９０～２７０万株／ｈｍ２基本苗范围内，每增加１５万苗，花生平均减产１８ｋｇ／ｈｍ２；小麦花生两熟制一体化栽培高产复合群体指标为：小麦基本苗１６５～１９５万／ｈｍ２，花生１３．５～１６．５万穴／ｈｍ２。高效复合群体最优组合为：小麦基本苗１２０万／ｈｍ２，花生播１５万穴／ｈｍ２。

Results from a field experiment showed that the number of basic seedling of wheat (NBSW) was the mains of the compound population and produced significant effects to yields of both Wheat and peanut in wheat-peanut cropping system with a 25～30 days cogrowth period; The plant density of peanut (PDP) exerted a greater influence on peanut yield, but little on wheat yield; An yield reduction of 18kg/hm2 occurred in peanut with an increase in NBSW of every 150000 plants/hm2 (in the NBSW was 900000～2700000 plants/hm2).The optimum compound population for the double high yields were that NBSW:1650000～1950000 plants/hm2 and PDP: 135000～165000 holes/hm2, and that for high profit in a year were that NBSW: 1200000/hm2 and PDP: 150000 holes/hm2.