Effects Of Tillage Measures On Different Varieties Of Grain-Forage Corn Growth And Its Formation Of Forage Quality

This test was been done on2013in Rainfed agricultural area in semi arid regionof the typical hilly region of Loess Plateau, located in Anding District of Gansu city inDingxi Province Li Jia Bao Zhen Gansu Agricultural University Dingxi threecombined with base. Experiments were carried out in the basis of all film doublefurrow sowing corn technology, test set tillage (conventional tillage, no tillage, rotarytillage and deep tillage) based processing, maize varieties (the rich peasants and richpeasants No.1821two grain and forage maize varieties) as deputy, split plotexperiment. Combined with the analysis of field test and indoor, the leaf area index,corn under different treatments during the whole growth period, photosyntheticpotential, yield, variation of water use and forage quality indicators, results show that:(1) at jointing stage and booting stage rotary tillage and deep tillage on the1leafarea index than other treatments influence, in the filling period subsoiling under the1still showed higher leaf area index, and rotary tillage treatments leaf area indexslightly lower, corn mature rotary tillage the high leaf area index of corn, rice growthperiod before the mid vigorous growth, high leaf area index is conducive to thegrowth and development of maize. Deep tillage and rotary tillage could significantlyincrease the corn leaf area index, the subsoiling and rotary tillage and, in improvingthe leaf area index is better than that of the rich peasants No.1821. Under differenttreatments of photosynthetic potential and leaf area of similar, subsoiling under the1photosynthetic potential than other treatments.(2) effects of different tillage measures of different varieties of grain and ForageMaize Dry matter accumulation is mainly reflected in the large bell to milky stagebefore, subsoiling under the No.1always has a higher dry matter accumulation, thatdeep tillage promoted the growth and development of maize; dry matter to grainrelative transfer the organs of maize, the highest in stems, leaves, cob at least, thesubsoiling in promoting dry matter transfer is better than other treatment.(3) subsoiling under different maize varieties showed higher water use efficiency,and higher water use efficiency into yield differences, the number1in the rotary tillage measures with high yield and straw yield slightly lower than subsoiling. The821in the rotary tillage treatment had higher straw yield and economic yield slightlylower than subsoiling; effects of different tillage measures on different varieties ofgrain and forage maize ear traits similar, deep tillage treatment has great effect on thepanicle traits, improves the double spike rate, promote grain growth, increased grainnumber,1000grain weight increased, so grain and forage maize yield efficiency.(4) the chlorophyll content of Maize under different treatments showed "S" curve,under different tillage measures of grain and forage maize chlorophyll content withthe growth continues to increase, and reached the highest in milk stage, excepttrumpet stage subsoiling under the821leaf chlorophyll content has always had ahigher content compared with the other treatments differed significantly; the contentof CP in leaves and leaf sheath decreased gradually with the growth stage to promote,in the early stage of CP content in leaf blade and sheath had no obvious rules, fromfilling stage to mature stage of subsoiling under the1varieties CP contentsignificantly higher than other treatments; different tillage than conventional tillagecan effectively to reduce the content of ADF in different organs of grain and foragemaize, including deep tillage treatment to reduce the ADF contents in different organsof outstanding performance, ADF content in various organs of the lower821. Deeptillage can reduce ADF content in maize organs to improve forage quality; growthstage effect of different tillage methods on grain and forage maize NDF content is notobvious, the growth period of great differences among different treatments, includingdeep tillage treatment had lower NDF content than other treatments, help to improvethe quality of grain and forage for corn, and can choose the priority of the1varietiesin reducing the content of NDF.