南京农业气候资源利用问题

南京农业气候资源潜力很大。就其光、热、水资源而言，在南部可以大力发展迟熟中粳，还可发展少量早熟晚粳；北部可以推行双膜植棉；在种植制度上，宜发展间作套种多熟制；在品种搭配上，如1年两熟，从北到南宜选用中、晚熟品种为主；关于发展亚热带果树问题，柑桔固树体耐冻力差，大冻年会全株死亡，在南京不宜发展，仅在高淳县个别小气候较暖之处，可以少量种植。枇杷在南京虽也会有冻害，但固树体抗寒力较强，且多数年份能正常结果，在长江南部丘陵山区可以发展。

Questions on Utilizing Nanjing Agricultural Climatic Resources

There are great potentialities in Nanjing agricultural climatic resources. With rgeard to the heat, light, water resources. It is suitable to devote major efforts to planting late-maturing rice in the south and a few early-maturing rice, and two-film cotton in the North. On plauting system, it is suitable to develop interplanting miltiple cropping systems; On varietivs proportions, it is suitable to plant mid-maturing or late-maturing varieties from the North to the Sourth, such as yielding two crops a year. On planting subtropical fruit trees, it is no good planting oranges in Nanjing city because of their bad winter hardiness, just can be planted in a few micropclimate place in Gao Chun county, though loguats may be hit by freezing damage, they can be planted in hilly lands in the south of Changjiang River district because of their stong cold resistance.