论文部分内容阅读
四川省南充地区小麦套玉米-甘薯三熟中厢分带轮作用地200万亩左右。近年来西充、南部和南充等县采用麦-玉-薯的薯垄边种植早秋玉米,或在双行早玉米两边靠宽行各种一行早秋薯,收到了显著的增产效果。一般每亩可增收玉米100～150kg,或增收甘薯110～160kg。这种多熟组合模式能充分利用时间差,开发晚秋自然资源,提高复种指数和土地生产力;特别是提高粮食产量,增加养猪的精、粗饲料,为粮食上新台阶开劈了新途径。其方法为:1.早秋玉米:①选地:一般以靠水源方便、土层深厚的一台地或河坝地较好,以利抗御伏旱。②品种:据近年品比试验和大面积示范,早秋玉米的品种为中单2号和丹玉13号等中熟杂交良种。③播期:安全播期是早秋玉米能否避灾增产的关键;因此,扬花期应安排在伏旱尾至秋淋前,南充地区一般在8月20日至9月10
Nanchong, Sichuan Province, wheat sets of maize - sweet potato triad in the role of sub-belt round about 200 acres. In recent years, Xicong, southern and Nanchong counties using wheat - jade - potato potato planting early autumn corn, corn, or early on both sides of the line by a wide variety of early autumn row of corn, received a significant yield increase. General corn per acre can be increased by 100 ~ 150kg, or increase the sweet potato 110 ~ 160kg. This multi-crop combination pattern can make full use of the time difference, develop the late autumn natural resources, raise the multiple cropping index and land productivity; especially improve the grain yield, increase the fine and coarse feed for pigs, and open up a new way for a new level of food. The method is: 1. Early autumn corn: ① election site: generally rely on convenient water source, a deep layer of soil or river dam better to ease the drought. ② Varieties: According to recent years, the proportion of tests and large-scale demonstration, early autumn corn varieties Zhongdan 2 and Dan Yu 13 and other medium-maturing hybrids. ③ sowing date: safe sowing is the key to early maize can avoid disaster; therefore, the flowering period should be arranged in the fall of the drought before the autumn leaching, Nanchong area generally in the August 20 to September 10