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大豆干物质日生产量受叶面积和净光合生产率高低影响。在高产栽培条件下,大豆插墒以后净光合生产率对干物质日生产量起主导作用。丰产大豆干物质积累与分配的特点是:全株干重积累速度在生育进程中是迅速而稳健的递升,开花以后,茎、叶干物质积累速度缓慢上升;结荚或鼓粒期缓慢下降;花荚、籽实干重迅速递增。 大豆生物学产量与经济产量呈正相关,经济系数与产量呈正相关。大豆由低产变高产应着重提高生物学产量;而高产再高产应在获得一定生物学产量前提下提高经济系数。 栽培措施对提高生物学产量和经济产量有显著作用,也相应地提高了经济系数。应当因地制宜地选用良种,培肥地力,合理密植以及采用灌水、喷洒激素等促进与控制相结合的栽培措施,达到大豆高产稳产的目的。
The daily dry matter production of soybean was affected by the leaf area and the net photosynthetic productivity. Under high-yielding cultivation conditions, the net photosynthetic productivity after soybean planting moisture played a dominant role on the daily dry matter production. The accumulation and distribution of dry matter in high-yielding soybean was characterized by rapid and steady whole-body dry weight accumulation during the growth process. After flowering, the accumulation of dry matter in stems and leaves slowly increased, while that in pod or drum decreased slowly. Flower pods, seeds, dry weight increased rapidly. Soybean biological yield and economic output was positively correlated, economic coefficient and yield were positively correlated. Soybean from low yield to high yield should focus on improving biological yield; and high yield and then high yield should be to obtain a certain amount of biological yield under the premise of improving the economic coefficient. Cultivation measures to improve the biological yield and economic output have a significant role, but also to improve the economic coefficient. Should be selected according to local conditions, cultivating fertility, close planting density and the use of irrigation, spraying hormone and other measures to promote the combination of cultivation and control to achieve high yield and stability of soybean purposes.