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1超高茬麦套稻根系发育特点1.1根量1991年观察:超高茬麦套稻在共生期间,单株平均根量为6.5条,同期育苗移栽的为12.7条,为麦收时单株发根数CK的1/2。剪根水培3天,单株平均发根仅0.35条,CK为3.65条。1994年籼粳稻不同品种考测结果也表明:在套播稻分蘖盛期之前,单株皆为CK的1/2左右。然而拔节后根量急剧增加,到齐穗期超过CK(见表1)。
1 super high stubble rice root development characteristics 1.1 root amount in 1991 observed: super high stubble wheat rice during symbiosis, the average single root volume is 6.5, the same period transplanting seedlings transplanted to 12.7 for the wheat harvest plants Hair root number CK 1/2. Root-cutting hydroponics for 3 days, the average single root hair root only 0.35, CK was 3.65. The test results of different varieties of indica and japonica in 1994 also showed that before the tillering stage of set-sowing rice, all the plants were about 1/2 of CK. However, the amount of roots increased sharply after jointing, reaching CK at heading stage (Table 1).